(R)-2′-Benz­yloxy-5,5′,6,6′,7,7′,8,8′-octa­hydro-1,1′-binaphthyl-2-ol

Abreu, A.R.; Ramos Silva, M.; Pereira, M.M.; Bayon, J.C.; Matos Beja, A.

doi:10.1107/S1600536810002308

organic compounds

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ISSN: 2056-9890

Volume 66| Part 2| February 2010| Page o437

https://doi.org/10.1107/S1600536810002308

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(R)-2′-Benzyloxy-5,5′,6,6′,7,7′,8,8′-octahydro-1,1′-binaphthyl-2-ol

Artur R. Abreu,^a Manuela Ramos Silva,^b ^* Mariette M. Pereira,^a J. Carles Bayon ^c and Ana Matos Beja ^b

^aChemistry Department, University of Coimbra, P-3004-516 Coimbra, Portugal, ^bCEMDRX, Physics Department, University of Coimbra, P-3004-516 Coimbra, Portugal, and ^cChemistry Department, University of Barcelona, Bellaterra, 08193 Barcelona, Portugal
^*Correspondence e-mail: manuela@pollux.fis.uc.pt

(Received 28 December 2009; accepted 18 January 2010; online 23 January 2010)

The molecules of the title compound, C₂₇H₂₈O₂, exhibit axial chirality. The planes of the aromatic rings of the tetralin ring systems make an angle of 85.72 (11)°. The non-aromatic rings adopt distorted half-chair conformations. In one of them, two C atoms of the four-atom aliphatic chain are disordered over two sites in a 0.75 (2):0.25 (2) ratio. The substituent phenyl ring is also disordered over two positions in a 0.59 (3):0.41 (3) ratio. There are no conventional hydrogen bonds joining the molecules.

Related literature

For the use of 1,1′-binaphthyl-2,2′-diol in asymmetric synthesis, see: Brunel (2005 ) Nájera et al. (2009 ). For the catalytic properties of related compounds, see: Zhang et al. (1997 ); Reetz et al. (1997 ); Chan et al. (1997 ); Waltz et al. (2004 ). For the synthetic procedure, see: Carrilho et al. (2009 ); Abreu et al. (2010 ).

Experimental

Crystal data

C₂₇H₂₈O₂
M_r = 384.49
Orthorhombic, P 2₁ 2₁ 2₁
a = 8.9871 (3) Å
b = 11.6926 (3) Å
c = 20.0324 (5) Å
V = 2105.06 (10) Å³
Z = 4
Mo Kα radiation
μ = 0.08 mm⁻¹
T = 293 K
0.30 × 0.30 × 0.22 mm

Data collection

Bruker SMART APEX CCD area-detector diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 2000) T_min = 0.944, T_max = 0.999
26201 measured reflections
2294 independent reflections
1798 reflections with I > 2σ(I)
R_int = 0.026

Refinement

R[F² > 2σ(F²)] = 0.038
wR(F²) = 0.094
S = 1.09
2294 reflections
329 parameters
H-atom parameters constrained
Δρ_max = 0.12 e Å⁻³
Δρ_min = −0.15 e Å⁻³

Data collection: SMART (Bruker, 2003 ); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPII (Johnson, 1976 ); software used to prepare material for publication: SHELXL97.

Supporting information

Crystal structure: contains datablocks global, I. DOI: https://doi.org/10.1107/S1600536810002308/om2312sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810002308/om2312Isup2.hkl

checkCIF report

Comment top

Over the last twenty years an explosive growth of the research in the field of asymmetric synthesis has occurred. The aim of such enantioselective synthesis is to produce chiral optically pure products. Chiral catalysts are often used to promote reactions and lead to the formation of enantiomericaly pure or enriched produts. 1,1'-binaphthyl-2,2'-diol (BINOL) and its derivatives are some of the most successful chiral catalysts in asymmetric synthesis (Brunel, 2005, Nájera et al., 2009). Catalysts containing partially hydrogenated BINOL ligands, 5,5',6,6',7,7',8,8'-octahydro-1,1'-bi-2-naphthol (H₈-BINOL) and 5,6,7,8-tetrahydro1,1'-bi-2-naphthol (H₄-BINOL) very often exhibited better stereoselectivity than those obtained from the corresponding BINOL catalysts (Zhang et al., 1997, Reetz et al., 1997, Chan et al., 1997, Waltz et al. 2004) Within our project of synthesizing BINOL and H₈-BINOL derivatives (Carrilho et al., 2009, Abreu et al., 2010), we have obtained the title compound, C₂₇H₂₈O₂. The molecules of the title compound, that lack a chiral carbon center, exhibit axial chirality: due to a restrited rotation around the aryl-aryl bond, the tetralin rings have a spatial arrangement that is not superposable on its mirror image. The angle between the planes of the aromatic rings of the tetralin ring systems is 85.72 (11)°. The C1—C10—C11—C20 torsion angle is -95.4 (3). In one of the fused ring systems, the four-atom aliphatic chain is disordered over two sites in a 0.75:0.25 ratio. The phenyl ring of the benzyloxy group is also disordered over two close positions (0.60:0.40). The non-aromatic rings adopt distorted half-chair conformations. There are no conventional hydrogen bonds joining the molecules, the H atom attached to O1 points to the π cloud of the aromatic ring C11/C12/C17/C18/C19/C20 with a distance to the centroid of 3.10° A and an O—H···centroid angle of 141.4°.

Related literature top

For the use of 1,1'-binaphthyl-2,2'-diol in asymmetric synthesis, see: Brunel (2005) Nájera et al. (2009). For the catalytic properties of related compounds, see: Zhang et al. (1997); Reetz et al. (1997); Chan et al. (1997); Waltz et al. (2004). For the synthetic procedure, see: Carrilho et al. (2009); Abreu et al. (2010).

Experimental top

The title compound was synthesized according to the previously reported method (Carrilho et al., 2009, Abreu et al., 2010).

Structure description top

Computing details top

Data collection: SMART (Bruker, 2003); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT (Bruker, 2003); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPII (Johnson, 1976); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top

Fig. 1. ORTEPII (Johnson, 1976) plot of the title compound. Displacement ellipsoids are drawn at the 50% level. For clarity reasons, only one of the disordered positions is shown.

(R)-2'-Benzyloxy-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl-2-ol top

Crystal data top

C₂₇H₂₈O₂	F(000) = 824
M_r = 384.49	D_x = 1.213 Mg m⁻³
Orthorhombic, P2₁2₁2₁	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: P 2ac 2ab	Cell parameters from 5906 reflections
a = 8.9871 (3) Å	θ = 2.5–22.4°
b = 11.6926 (3) Å	µ = 0.08 mm⁻¹
c = 20.0324 (5) Å	T = 293 K
V = 2105.06 (10) Å³	Prism, colorless
Z = 4	0.30 × 0.30 × 0.22 mm

Data collection top

Bruker SMART APEX CCD area-detector diffractometer	2294 independent reflections
Radiation source: fine-focus sealed tube	1798 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.026
φ and ω scans	θ_max = 25.8°, θ_min = 2.0°
Absorption correction: multi-scan (SADABS; Sheldrick, 2000)	h = −10→10
T_min = 0.944, T_max = 0.999	k = −13→14
26201 measured reflections	l = −24→24

Refinement top

Refinement on F²	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.038	H-atom parameters constrained
wR(F²) = 0.094	w = 1/[σ²(F_o²) + (0.0428P)² + 0.2705P] where P = (F_o² + 2F_c²)/3
S = 1.09	(Δ/σ)_max < 0.001
2294 reflections	Δρ_max = 0.12 e Å⁻³
329 parameters	Δρ_min = −0.15 e Å⁻³
Primary atom site location: structure-invariant direct methods

Crystal data top

C₂₇H₂₈O₂	V = 2105.06 (10) Å³
M_r = 384.49	Z = 4
Orthorhombic, P2₁2₁2₁	Mo Kα radiation
a = 8.9871 (3) Å	µ = 0.08 mm⁻¹
b = 11.6926 (3) Å	T = 293 K
c = 20.0324 (5) Å	0.30 × 0.30 × 0.22 mm

Data collection top

Bruker SMART APEX CCD area-detector diffractometer	2294 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 2000)	1798 reflections with I > 2σ(I)
T_min = 0.944, T_max = 0.999	R_int = 0.026
26201 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.038	329 parameters
wR(F²) = 0.094	H-atom parameters constrained
S = 1.09	Δρ_max = 0.12 e Å⁻³
2294 reflections	Δρ_min = −0.15 e Å⁻³

Special details top

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
O1	0.5068 (3)	0.40183 (17)	0.26056 (9)	0.0769 (6)
H1	0.4498	0.4536	0.2500	0.115*
O2	0.1397 (2)	0.34165 (15)	0.17560 (10)	0.0679 (5)
C1	0.5140 (3)	0.32318 (19)	0.20970 (12)	0.0529 (6)
C2	0.6048 (3)	0.2290 (2)	0.21946 (13)	0.0622 (7)
H2	0.6582	0.2207	0.2589	0.075*
C3	0.6146 (3)	0.1486 (2)	0.17029 (13)	0.0604 (7)
H3	0.6764	0.0858	0.1768	0.072*
C4	0.5357 (3)	0.15730 (18)	0.11101 (12)	0.0522 (6)
C5	0.5454 (4)	0.0637 (2)	0.05917 (16)	0.0709 (8)
H5A	0.6390	0.0710	0.0354	0.085*
H5B	0.5454	−0.0098	0.0816	0.085*
C6	0.4207 (4)	0.0661 (3)	0.00973 (16)	0.0836 (10)
H6A	0.4431	0.0143	−0.0267	0.100*
H6B	0.3300	0.0400	0.0311	0.100*
C7	0.3975 (4)	0.1834 (3)	−0.01718 (14)	0.0765 (9)
H7A	0.3179	0.1817	−0.0499	0.092*
H7B	0.4874	0.2085	−0.0396	0.092*
C8	0.3580 (3)	0.2683 (2)	0.03772 (12)	0.0589 (7)
H8A	0.3731	0.3452	0.0209	0.071*
H8B	0.2533	0.2602	0.0484	0.071*
C9	0.4471 (3)	0.25388 (18)	0.10066 (11)	0.0443 (5)
C10	0.4371 (3)	0.33731 (18)	0.15065 (10)	0.0430 (5)
C11	0.3478 (3)	0.44389 (19)	0.14014 (10)	0.0436 (5)
C12	0.4165 (3)	0.5432 (2)	0.11576 (11)	0.0450 (6)
C13	0.5816 (3)	0.5420 (2)	0.10123 (14)	0.0579 (7)
H13A	0.5986	0.4991	0.0605	0.069*
H13B	0.6322	0.5023	0.1372	0.069*
C14A	0.6497 (9)	0.6605 (7)	0.0935 (6)	0.0717 (19)	0.75 (2)
H14A	0.7489	0.6542	0.0748	0.086*	0.75 (2)
H14B	0.6574	0.6971	0.1368	0.086*	0.75 (2)
C15A	0.5503 (9)	0.7326 (5)	0.0470 (5)	0.077 (2)	0.75 (2)
H15A	0.5972	0.8059	0.0385	0.093*	0.75 (2)
H15B	0.5377	0.6935	0.0047	0.093*	0.75 (2)
C23A	−0.112 (4)	0.489 (4)	0.281 (3)	0.069 (4)	0.41 (3)
H23A	−0.1758	0.5157	0.2478	0.083*	0.41 (3)
C24A	−0.112 (3)	0.540 (4)	0.347 (2)	0.080 (4)	0.41 (3)
H24A	−0.1781	0.5976	0.3585	0.096*	0.41 (3)
C25A	−0.009 (3)	0.499 (3)	0.3897 (18)	0.075 (4)	0.41 (3)
H25A	−0.0053	0.5284	0.4327	0.090*	0.41 (3)
C26A	0.090 (4)	0.416 (2)	0.3722 (17)	0.072 (4)	0.41 (3)
H26A	0.1616	0.3944	0.4035	0.086*	0.41 (3)
C27A	0.092 (6)	0.365 (3)	0.316 (3)	0.064 (4)	0.41 (3)
H27A	0.1601	0.3073	0.3057	0.077*	0.41 (3)
C14B	0.635 (3)	0.641 (2)	0.0616 (14)	0.067 (5)	0.25 (2)
H14C	0.7425	0.6449	0.0642	0.081*	0.25 (2)
H14D	0.6077	0.6301	0.0152	0.081*	0.25 (2)
C15B	0.571 (2)	0.7482 (16)	0.0862 (18)	0.078 (6)	0.25 (2)
H15C	0.6133	0.8116	0.0616	0.093*	0.25 (2)
H15D	0.5964	0.7578	0.1329	0.093*	0.25 (2)
C23B	−0.142 (3)	0.469 (3)	0.2812 (17)	0.069 (4)	0.59 (3)
H23B	−0.2175	0.4721	0.2495	0.082*	0.59 (3)
C24B	−0.157 (2)	0.532 (2)	0.3375 (13)	0.080 (4)	0.59 (3)
H24B	−0.2376	0.5810	0.3422	0.095*	0.59 (3)
C25B	−0.052 (2)	0.5232 (18)	0.3887 (11)	0.074 (4)	0.59 (3)
H25B	−0.0627	0.5666	0.4274	0.089*	0.59 (3)
C26B	0.065 (2)	0.4502 (18)	0.3814 (11)	0.071 (4)	0.59 (3)
H26B	0.1335	0.4389	0.4157	0.086*	0.59 (3)
C27B	0.079 (4)	0.392 (2)	0.319 (2)	0.064 (4)	0.59 (3)
H27B	0.1612	0.3440	0.3128	0.077*	0.59 (3)
C16	0.4025 (4)	0.7508 (2)	0.07886 (14)	0.0699 (8)
H16A	0.3358	0.7850	0.0465	0.084*
H16B	0.4138	0.8044	0.1155	0.084*
C17	0.3329 (3)	0.6418 (2)	0.10512 (11)	0.0509 (6)
C18	0.1833 (3)	0.6394 (2)	0.12075 (12)	0.0599 (7)
H18	0.1270	0.7052	0.1143	0.072*
C19	0.1144 (3)	0.5433 (2)	0.14556 (12)	0.0600 (7)
H19	0.0137	0.5448	0.1563	0.072*
C20	0.1962 (3)	0.4446 (2)	0.15439 (11)	0.0505 (6)
C21	−0.0075 (3)	0.3394 (3)	0.20324 (14)	0.0707 (8)
H21A	−0.0377	0.2605	0.2095	0.085*
H21B	−0.0759	0.3742	0.1718	0.085*
C22	−0.0181 (3)	0.4012 (2)	0.26870 (13)	0.0560 (7)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
O1	0.0951 (16)	0.0787 (13)	0.0568 (10)	0.0208 (12)	−0.0111 (11)	−0.0132 (9)
O2	0.0558 (11)	0.0554 (10)	0.0924 (12)	−0.0041 (9)	0.0288 (10)	−0.0081 (10)
C1	0.0592 (16)	0.0494 (13)	0.0500 (13)	0.0042 (13)	0.0045 (12)	0.0043 (11)
C2	0.0661 (18)	0.0623 (16)	0.0583 (14)	0.0106 (15)	0.0012 (14)	0.0150 (13)
C3	0.0609 (17)	0.0441 (13)	0.0763 (16)	0.0138 (13)	0.0138 (14)	0.0197 (13)
C4	0.0524 (15)	0.0348 (11)	0.0696 (15)	−0.0013 (12)	0.0172 (13)	0.0057 (11)
C5	0.078 (2)	0.0419 (14)	0.093 (2)	0.0029 (15)	0.0260 (18)	−0.0077 (14)
C6	0.089 (2)	0.0685 (19)	0.093 (2)	−0.0068 (18)	0.019 (2)	−0.0367 (17)
C7	0.078 (2)	0.085 (2)	0.0667 (16)	−0.0009 (18)	0.0029 (15)	−0.0224 (16)
C8	0.0582 (16)	0.0596 (15)	0.0589 (14)	0.0007 (14)	0.0023 (13)	−0.0099 (12)
C9	0.0427 (13)	0.0364 (11)	0.0539 (12)	−0.0036 (10)	0.0107 (11)	0.0026 (10)
C10	0.0437 (13)	0.0371 (11)	0.0483 (11)	−0.0010 (11)	0.0089 (11)	0.0043 (10)
C11	0.0476 (14)	0.0399 (12)	0.0434 (11)	0.0064 (11)	0.0010 (10)	−0.0041 (10)
C12	0.0510 (14)	0.0403 (12)	0.0438 (11)	0.0036 (11)	−0.0008 (11)	−0.0030 (10)
C13	0.0558 (17)	0.0485 (14)	0.0694 (15)	0.0006 (13)	0.0048 (14)	0.0055 (13)
C14A	0.069 (4)	0.058 (3)	0.088 (5)	−0.017 (3)	0.006 (4)	0.001 (4)
C15A	0.116 (5)	0.042 (2)	0.075 (4)	−0.008 (3)	0.023 (4)	0.008 (3)
C23A	0.044 (10)	0.093 (10)	0.069 (2)	0.004 (7)	0.010 (7)	−0.002 (6)
C24A	0.069 (10)	0.096 (5)	0.074 (7)	0.012 (9)	0.011 (8)	−0.014 (4)
C25A	0.071 (11)	0.083 (9)	0.069 (2)	−0.002 (6)	0.017 (7)	−0.017 (5)
C26A	0.060 (8)	0.090 (12)	0.065 (6)	−0.007 (7)	0.004 (5)	−0.006 (7)
C27A	0.051 (6)	0.063 (11)	0.080 (4)	0.003 (8)	0.007 (4)	0.008 (9)
C14B	0.065 (9)	0.056 (11)	0.081 (12)	−0.014 (8)	−0.006 (11)	0.007 (10)
C15B	0.088 (11)	0.056 (9)	0.089 (15)	−0.002 (8)	−0.008 (10)	0.010 (10)
C23B	0.044 (9)	0.093 (10)	0.069 (2)	0.003 (6)	0.010 (6)	−0.003 (5)
C24B	0.067 (10)	0.097 (4)	0.074 (7)	0.012 (8)	0.012 (8)	−0.015 (4)
C25B	0.071 (11)	0.083 (9)	0.069 (2)	−0.002 (6)	0.018 (7)	−0.017 (5)
C26B	0.060 (8)	0.091 (12)	0.064 (6)	−0.007 (7)	0.004 (5)	−0.006 (7)
C27B	0.050 (5)	0.062 (11)	0.080 (4)	0.004 (7)	0.007 (4)	0.008 (9)
C16	0.099 (2)	0.0436 (15)	0.0676 (16)	0.0071 (15)	−0.0067 (17)	0.0063 (13)
C17	0.0662 (18)	0.0420 (13)	0.0444 (12)	0.0092 (13)	−0.0044 (12)	−0.0018 (11)
C18	0.072 (2)	0.0526 (15)	0.0549 (14)	0.0236 (15)	−0.0084 (13)	−0.0043 (12)
C19	0.0492 (16)	0.0681 (17)	0.0627 (15)	0.0151 (14)	0.0028 (13)	−0.0103 (14)
C20	0.0492 (15)	0.0491 (13)	0.0531 (13)	0.0027 (12)	0.0057 (11)	−0.0084 (11)
C21	0.0506 (16)	0.0779 (17)	0.0835 (18)	−0.0146 (15)	0.0171 (14)	−0.0169 (16)
C22	0.0414 (15)	0.0584 (15)	0.0683 (17)	−0.0077 (13)	0.0070 (14)	−0.0010 (13)

Geometric parameters (Å, º) top

O1—C1	1.374 (3)	C23A—C22	1.35 (5)
O1—H1	0.8200	C23A—C24A	1.45 (7)
O2—C20	1.374 (3)	C23A—H23A	0.9300
O2—C21	1.434 (3)	C24A—C25A	1.35 (4)
C1—C10	1.380 (3)	C24A—H24A	0.9300
C1—C2	1.384 (3)	C25A—C26A	1.37 (3)
C2—C3	1.365 (4)	C25A—H25A	0.9300
C2—H2	0.9300	C26A—C27A	1.28 (6)
C3—C4	1.387 (4)	C26A—H26A	0.9300
C3—H3	0.9300	C27A—C22	1.43 (6)
C4—C9	1.397 (3)	C27A—H27A	0.9300
C4—C5	1.511 (3)	C14B—C15B	1.47 (5)
C5—C6	1.495 (5)	C14B—H14C	0.9700
C5—H5A	0.9700	C14B—H14D	0.9700
C5—H5B	0.9700	C15B—C16	1.518 (18)
C6—C7	1.488 (4)	C15B—H15C	0.9700
C6—H6A	0.9700	C15B—H15D	0.9700
C6—H6B	0.9700	C23B—C24B	1.35 (4)
C7—C8	1.524 (3)	C23B—C22	1.39 (3)
C7—H7A	0.9700	C23B—H23B	0.9300
C7—H7B	0.9700	C24B—C25B	1.39 (3)
C8—C9	1.503 (3)	C24B—H24B	0.9300
C8—H8A	0.9700	C25B—C26B	1.367 (17)
C8—H8B	0.9700	C25B—H25B	0.9300
C9—C10	1.401 (3)	C26B—C27B	1.43 (4)
C10—C11	1.497 (3)	C26B—H26B	0.9300
C11—C20	1.392 (3)	C27B—C22	1.34 (4)
C11—C12	1.403 (3)	C27B—H27B	0.9300
C12—C17	1.392 (3)	C16—C17	1.515 (4)
C12—C13	1.512 (4)	C16—H16A	0.9700
C13—C14B	1.48 (2)	C16—H16B	0.9700
C13—C14A	1.523 (8)	C17—C18	1.380 (4)
C13—H13A	0.9700	C18—C19	1.376 (4)
C13—H13B	0.9700	C18—H18	0.9300
C14A—C15A	1.542 (17)	C19—C20	1.379 (4)
C14A—H14A	0.9700	C19—H19	0.9300
C14A—H14B	0.9700	C21—C22	1.500 (4)
C15A—C16	1.488 (7)	C21—H21A	0.9700
C15A—H15A	0.9700	C21—H21B	0.9700
C15A—H15B	0.9700

C1—O1—H1	109.5	C24A—C23A—H23A	120.8
C20—O2—C21	118.4 (2)	C25A—C24A—C23A	116 (4)
O1—C1—C10	122.1 (2)	C25A—C24A—H24A	122.1
O1—C1—C2	117.1 (2)	C23A—C24A—H24A	122.1
C10—C1—C2	120.8 (2)	C24A—C25A—C26A	122 (3)
C3—C2—C1	119.0 (2)	C24A—C25A—H25A	118.8
C3—C2—H2	120.5	C26A—C25A—H25A	118.8
C1—C2—H2	120.5	C27A—C26A—C25A	124 (4)
C2—C3—C4	122.3 (2)	C27A—C26A—H26A	117.8
C2—C3—H3	118.8	C25A—C26A—H26A	117.8
C4—C3—H3	118.8	C26A—C27A—C22	116 (3)
C3—C4—C9	118.5 (2)	C26A—C27A—H27A	122.1
C3—C4—C5	120.4 (2)	C22—C27A—H27A	121.0
C9—C4—C5	121.1 (2)	C15B—C14B—C13	111 (2)
C6—C5—C4	113.5 (2)	C15B—C14B—H14C	109.4
C6—C5—H5A	108.9	C13—C14B—H14C	109.4
C4—C5—H5A	108.9	C15B—C14B—H14D	109.4
C6—C5—H5B	108.9	C13—C14B—H14D	109.4
C4—C5—H5B	108.9	H14C—C14B—H14D	108.0
H5A—C5—H5B	107.7	C14B—C15B—C16	112 (2)
C7—C6—C5	111.2 (3)	C14B—C15B—H15C	109.2
C7—C6—H6A	109.4	C16—C15B—H15C	109.2
C5—C6—H6A	109.4	C14B—C15B—H15D	109.2
C7—C6—H6B	109.4	C16—C15B—H15D	109.2
C5—C6—H6B	109.4	H15C—C15B—H15D	107.9
H6A—C6—H6B	108.0	C24B—C23B—C22	123 (2)
C6—C7—C8	111.8 (2)	C24B—C23B—H23B	118.7
C6—C7—H7A	109.3	C22—C23B—H23B	118.7
C8—C7—H7A	109.3	C23B—C24B—C25B	121 (2)
C6—C7—H7B	109.3	C23B—C24B—H24B	119.7
C8—C7—H7B	109.3	C25B—C24B—H24B	119.7
H7A—C7—H7B	107.9	C26B—C25B—C24B	119.2 (19)
C9—C8—C7	114.1 (2)	C26B—C25B—H25B	120.4
C9—C8—H8A	108.7	C24B—C25B—H25B	120.4
C7—C8—H8A	108.7	C25B—C26B—C27B	117 (2)
C9—C8—H8B	108.7	C25B—C26B—H26B	121.3
C7—C8—H8B	108.7	C27B—C26B—H26B	121.3
H8A—C8—H8B	107.6	C22—C27B—C26B	124 (2)
C4—C9—C10	119.6 (2)	C22—C27B—H27B	118.0
C4—C9—C8	121.2 (2)	C26B—C27B—H27B	118.0
C10—C9—C8	119.2 (2)	C15A—C16—C17	113.4 (3)
C1—C10—C9	119.8 (2)	C17—C16—C15B	111.1 (7)
C1—C10—C11	119.25 (19)	C15A—C16—H16A	108.9
C9—C10—C11	120.92 (19)	C17—C16—H16A	108.9
C20—C11—C12	119.8 (2)	C15B—C16—H16A	133.5
C20—C11—C10	120.1 (2)	C15A—C16—H16B	108.9
C12—C11—C10	120.2 (2)	C17—C16—H16B	108.9
C17—C12—C11	120.1 (2)	C15B—C16—H16B	80.6
C17—C12—C13	120.5 (2)	H16A—C16—H16B	107.7
C11—C12—C13	119.4 (2)	C18—C17—C12	118.3 (2)
C14B—C13—C12	114.4 (10)	C18—C17—C16	119.9 (2)
C12—C13—C14A	113.9 (4)	C12—C17—C16	121.8 (2)
C14B—C13—H13A	84.3	C19—C18—C17	122.5 (3)
C12—C13—H13A	108.8	C19—C18—H18	118.8
C14A—C13—H13A	108.8	C17—C18—H18	118.8
C14B—C13—H13B	128.3	C18—C19—C20	119.3 (2)
C12—C13—H13B	108.8	C18—C19—H19	120.3
C14A—C13—H13B	108.8	C20—C19—H19	120.3
H13A—C13—H13B	107.7	O2—C20—C19	125.1 (2)
C13—C14A—C15A	109.0 (8)	O2—C20—C11	114.8 (2)
C13—C14A—H14A	109.9	C19—C20—C11	120.0 (2)
C15A—C14A—H14A	109.9	O2—C21—C22	112.8 (2)
C13—C14A—H14B	109.9	O2—C21—H21A	109.0
C15A—C14A—H14B	109.9	C22—C21—H21A	109.0
H14A—C14A—H14B	108.3	O2—C21—H21B	109.0
C16—C15A—C14A	109.6 (7)	C22—C21—H21B	109.0
C16—C15A—H15A	109.7	H21A—C21—H21B	107.8
C14A—C15A—H15A	109.7	C27B—C22—C23B	115.8 (18)
C16—C15A—H15B	109.7	C23A—C22—C27A	123 (3)
C14A—C15A—H15B	109.7	C27B—C22—C21	125.1 (12)
H15A—C15A—H15B	108.2	C23A—C22—C21	124 (2)
C22—C23A—C24A	118 (4)	C23B—C22—C21	119.0 (14)
C22—C23A—H23A	120.8	C27A—C22—C21	112.8 (19)

O1—C1—C2—C3	179.7 (2)	C12—C13—C14B—C15B	44 (3)
C10—C1—C2—C3	−1.5 (4)	C14A—C13—C14B—C15B	−51 (3)
C1—C2—C3—C4	−0.6 (4)	C13—C14B—C15B—C16	−63 (3)
C2—C3—C4—C9	2.2 (4)	C22—C23B—C24B—C25B	−5 (4)
C2—C3—C4—C5	−177.5 (2)	C23B—C24B—C25B—C26B	0 (4)
C3—C4—C5—C6	161.4 (3)	C24B—C25B—C26B—C27B	4 (4)
C9—C4—C5—C6	−18.3 (4)	C25B—C26B—C27B—C22	−2 (4)
C4—C5—C6—C7	48.1 (3)	C14A—C15A—C16—C17	−49.2 (10)
C5—C6—C7—C8	−60.5 (4)	C14B—C15B—C16—C17	48 (3)
C6—C7—C8—C9	41.5 (4)	C11—C12—C17—C18	1.6 (3)
C3—C4—C9—C10	−1.7 (3)	C13—C12—C17—C18	−178.4 (2)
C5—C4—C9—C10	178.0 (2)	C11—C12—C17—C16	180.0 (2)
C3—C4—C9—C8	−179.6 (2)	C13—C12—C17—C16	0.0 (4)
C5—C4—C9—C8	0.1 (3)	C15A—C16—C17—C18	−164.1 (6)
C7—C8—C9—C4	−11.7 (3)	C15B—C16—C17—C18	161.5 (15)
C7—C8—C9—C10	170.4 (2)	C15A—C16—C17—C12	17.6 (6)
O1—C1—C10—C9	−179.3 (2)	C15B—C16—C17—C12	−16.8 (15)
C2—C1—C10—C9	1.9 (4)	C12—C17—C18—C19	−0.8 (4)
O1—C1—C10—C11	2.7 (4)	C16—C17—C18—C19	−179.2 (2)
C2—C1—C10—C11	−176.1 (2)	C17—C18—C19—C20	−1.0 (4)
C4—C9—C10—C1	−0.3 (3)	C21—O2—C20—C19	−12.9 (4)
C8—C9—C10—C1	177.7 (2)	C21—O2—C20—C11	168.4 (2)
C4—C9—C10—C11	177.6 (2)	C18—C19—C20—O2	−176.7 (2)
C8—C9—C10—C11	−4.4 (3)	C18—C19—C20—C11	1.9 (4)
C1—C10—C11—C20	−95.4 (3)	C12—C11—C20—O2	177.69 (19)
C9—C10—C11—C20	86.7 (3)	C10—C11—C20—O2	−2.1 (3)
C1—C10—C11—C12	84.8 (3)	C12—C11—C20—C19	−1.0 (3)
C9—C10—C11—C12	−93.2 (3)	C10—C11—C20—C19	179.1 (2)
C20—C11—C12—C17	−0.7 (3)	C20—O2—C21—C22	−67.3 (3)
C10—C11—C12—C17	179.08 (19)	C26B—C27B—C22—C23B	−3 (4)
C20—C11—C12—C13	179.3 (2)	C26B—C27B—C22—C21	−178.9 (18)
C10—C11—C12—C13	−0.9 (3)	C24A—C23A—C22—C27A	−6 (5)
C17—C12—C13—C14B	−13.4 (14)	C24A—C23A—C22—C21	179 (2)
C11—C12—C13—C14B	166.5 (13)	C24B—C23B—C22—C27B	7 (3)
C17—C12—C13—C14A	15.8 (6)	C24B—C23B—C22—C21	−177 (2)
C11—C12—C13—C14A	−164.2 (5)	C26A—C27A—C22—C23A	4 (6)
C12—C13—C14A—C15A	−47.0 (9)	C26A—C27A—C22—C21	179 (3)
C13—C14A—C15A—C16	64.6 (11)	O2—C21—C22—C27B	−44.8 (19)
C22—C23A—C24A—C25A	4 (5)	O2—C21—C22—C23A	123.0 (19)
C23A—C24A—C25A—C26A	1 (6)	O2—C21—C22—C23B	139.0 (12)
C24A—C25A—C26A—C27A	−4 (7)	O2—C21—C22—C27A	−52 (2)
C25A—C26A—C27A—C22	1 (7)

Experimental details

Crystal data
Chemical formula	C₂₇H₂₈O₂
M_r	384.49
Crystal system, space group	Orthorhombic, P2₁2₁2₁
Temperature (K)	293
a, b, c (Å)	8.9871 (3), 11.6926 (3), 20.0324 (5)
V (Å³)	2105.06 (10)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	0.08
Crystal size (mm)	0.30 × 0.30 × 0.22

Data collection
Diffractometer	Bruker SMART APEX CCD area-detector
Absorption correction	Multi-scan (SADABS; Sheldrick, 2000)
T_min, T_max	0.944, 0.999
No. of measured, independent and observed [I > 2σ(I)] reflections	26201, 2294, 1798
R_int	0.026
(sin θ/λ)_max (Å⁻¹)	0.611

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.094, 1.09
No. of reflections	2294
No. of parameters	329
No. of restraints	?
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.12, −0.15

Computer programs: SMART (Bruker, 2003), SAINT (Bruker, 2003), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEPII (Johnson, 1976).

Acknowledgements

This work was supported by the Fundação para a Ciência e a Tecnologia (FCT) through project PTDC/QUI/66015/2006 and Merquinsa (Barcelona, Spain). ARA also thanks the FCT for a PhD grant (SFRH/BD/21314/2005).

References

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