organic compounds
(6S*)-6-[(1S*,2R*)-1,2-Dihydroxypentyl]-4-methoxy-5,6-dihydro-2H-pyran-2-one
aDepartment of Chemistry, University of Central Florida, 4104 Libra Drive, Orlando, FL 32816, USA, bUniversity of Utah, Department of Chemistry, 315 S. 1400 E. Rm. 2020, Salt Lake City, UT 84112, USA, and cDepartment of Plant Sciences and Plant Pathology, Montana State University, 206 Plant Bioscience Building, Bozeman, MT 59717, USA
*Correspondence e-mail: James.Harper@ucf.edu
The title compound, C11H18O5, was isolated from a liquid culture of Pestalotiopsis sp. In the molecule, the pyran-2-one ring assumes a half-chair conformation. The two terminal C atoms of the pentyl group were refined as disordered over two sets of sites, with refined occupancies of 0.881 (10) and 0.119 (10). In the crystal, molecules are linked via O—H⋯O hydrogen bonds forming a three-dimensional network.
CCDC reference: 964216
Related literature
For the first isolation of the title compound, see: McGahren et al. (1973). For the natural and unnatural stereospecific synthesis, see: Kirihata et al. (1990, 1992a,b); Masaki et al. (1994). For closely related products from other fungi, see: Kimura et al. (1986); Kirihata et al. (1996); Lee et al. (1995); Davies-Coleman & Rivett (1989). For biological activity, see: Venkatasubbaiah & Van Dyke (1991). For crystal structures of related compounds, see: Yoshino & Nowacki (1972); Engel & Nowacki (1972a,b).
Experimental
Crystal data
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Data collection: COLLECT (Nonius, 1998); cell DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: WinGX (Farrugia, 2012), ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
CCDC reference: 964216
10.1107/S1600536813027025/lh5653sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813027025/lh5653Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813027025/lh5653Isup3.cml
The title compound was obtained by
(CH2Cl2/H2O) of a culture of an endophytic Pestalotiopsis sp. The CH2Cl2 fraction was evaporated under reduced pressure then purified by on a silica column with CHCl3/CH3OH (8/2) as After pooling common fractions, a crystal was grown by slow evaporation of a MeOH solution.The molecule exhibits orientational disorder at atoms C4 and C5. Hydrogen atoms were located and refined isotropically except those on C4 and C5 which were placed in calculated positions of C—H = 0.98 and 0.99Å and assigned isotropic displacement parameters of Uiso(H) = 1.2Ueq(C) or 1.5Ueq(Cmethyl), and their coordinates were allowed to ride on their respective carbons using SHELXL97 (Sheldrick, 2008). In the absence of
effects the Friedel pairs were merged. The is not known.Data collection: COLLECT (Nonius, 1998); cell
DENZO-SMN (Otwinowski & Minor, 1997); data reduction: DENZO-SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: WinGX (Farrugia, 2012), ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C11H18O5 | F(000) = 496 |
Mr = 230.25 | Dx = 1.274 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 17230 reflections |
a = 5.0375 (3) Å | θ = 1.0–27.5° |
b = 11.4515 (13) Å | µ = 0.10 mm−1 |
c = 20.802 (2) Å | T = 200 K |
V = 1200.02 (19) Å3 | Plate, colorless |
Z = 4 | 0.28 × 0.18 × 0.08 mm |
Nonius KappaCCD diffractometer | 1616 independent reflections |
Radiation source: fine-focus sealed tube | 1153 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.043 |
ϕ plus ω scans | θmax = 27.5°, θmin = 3.4° |
Absorption correction: multi-scan (DENZO-SMN; Otwinowski & Minor, 1997) | h = −6→6 |
Tmin = 0.973, Tmax = 0.992 | k = −14→14 |
2711 measured reflections | l = −26→26 |
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)] = 0.052 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.121 | w = 1/[σ2(Fo2) + (0.0544P)2 + 0.1236P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max < 0.001 |
1616 reflections | Δρmax = 0.16 e Å−3 |
188 parameters | Δρmin = −0.18 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.033 (6) |
C11H18O5 | V = 1200.02 (19) Å3 |
Mr = 230.25 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 5.0375 (3) Å | µ = 0.10 mm−1 |
b = 11.4515 (13) Å | T = 200 K |
c = 20.802 (2) Å | 0.28 × 0.18 × 0.08 mm |
Nonius KappaCCD diffractometer | 1616 independent reflections |
Absorption correction: multi-scan (DENZO-SMN; Otwinowski & Minor, 1997) | 1153 reflections with I > 2σ(I) |
Tmin = 0.973, Tmax = 0.992 | Rint = 0.043 |
2711 measured reflections |
R[F2 > 2σ(F2)] = 0.052 | 0 restraints |
wR(F2) = 0.121 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.16 e Å−3 |
1616 reflections | Δρmin = −0.18 e Å−3 |
188 parameters |
Experimental. The program DENZO-SMN (Otwinowski & Minor, 1997) uses a scaling algorithm that effectively corrects for absorption effects. High redundancy data were used in the scaling program thus the 'multi-scan' code word was used. No transmission coefficients are available from the program (only scale factors for each frame). The scale factors in the experimental table are calculated from the 'size' command in the SHELXL97<i/> input file. |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.4082 (4) | 0.31378 (17) | 0.78556 (9) | 0.0429 (5) | |
O2 | 0.5372 (5) | 0.4250 (2) | 0.70604 (12) | 0.0678 (7) | |
O4 | −0.0742 (6) | 0.5734 (2) | 0.85714 (11) | 0.0685 (8) | |
O1' | 0.5361 (4) | 0.1294 (2) | 0.86362 (10) | 0.0451 (6) | |
H1'O | 0.516 (7) | 0.066 (3) | 0.8434 (15) | 0.050 (10)* | |
O2' | 0.2491 (5) | 0.21272 (19) | 0.97762 (9) | 0.0443 (5) | |
H2'O | 0.125 (8) | 0.238 (3) | 0.9970 (17) | 0.051 (10)* | |
C2 | 0.4146 (7) | 0.4194 (3) | 0.75666 (15) | 0.0481 (8) | |
C3 | 0.2702 (8) | 0.5156 (3) | 0.78511 (15) | 0.0541 (8) | |
H3 | 0.302 (8) | 0.590 (3) | 0.7637 (17) | 0.070 (11)* | |
C4 | 0.0890 (7) | 0.4946 (3) | 0.83017 (13) | 0.0520 (8) | |
C5 | 0.0460 (6) | 0.3748 (3) | 0.85552 (15) | 0.0454 (7) | |
H5A | −0.004 (7) | 0.381 (2) | 0.9013 (15) | 0.048 (8)* | |
H5B | −0.094 (8) | 0.335 (3) | 0.8314 (15) | 0.056 (9)* | |
C6 | 0.3007 (6) | 0.3053 (3) | 0.85045 (13) | 0.0395 (7) | |
H6 | 0.433 (6) | 0.340 (2) | 0.8789 (12) | 0.028 (6)* | |
C1' | 0.2742 (5) | 0.1766 (3) | 0.86336 (14) | 0.0376 (6) | |
H1' | 0.168 (5) | 0.146 (2) | 0.8299 (12) | 0.026 (7)* | |
C2' | 0.1275 (6) | 0.1490 (3) | 0.92562 (14) | 0.0421 (7) | |
H2' | −0.057 (6) | 0.174 (3) | 0.9211 (14) | 0.044 (8)* | |
C3'A | 0.1175 (9) | 0.0209 (3) | 0.94034 (14) | 0.0598 (9) | 0.881 (10) |
H3'A | 0.3000 | −0.0079 | 0.9481 | 0.072* | 0.881 (10) |
H3'B | 0.0454 | −0.0213 | 0.9027 | 0.072* | 0.881 (10) |
C4'A | −0.0549 (13) | −0.0058 (5) | 0.99940 (18) | 0.0624 (14) | 0.881 (10) |
H4'A | 0.0249 | 0.0315 | 1.0377 | 0.075* | 0.881 (10) |
H4'B | −0.2335 | 0.0283 | 0.9930 | 0.075* | 0.881 (10) |
C5'A | −0.0814 (18) | −0.1325 (4) | 1.0111 (3) | 0.118 (3) | 0.881 (10) |
H5'A | −0.1905 | −0.1454 | 1.0495 | 0.177* | 0.881 (10) |
H5'B | 0.0949 | −0.1666 | 1.0178 | 0.177* | 0.881 (10) |
H5'C | −0.1660 | −0.1695 | 0.9739 | 0.177* | 0.881 (10) |
C3'B | 0.1175 (9) | 0.0209 (3) | 0.94034 (14) | 0.0598 (9) | 0.119 (10) |
H3'C | 0.2915 | −0.0094 | 0.9258 | 0.072* | 0.119 (10) |
H3'D | −0.0147 | −0.0109 | 0.9098 | 0.072* | 0.119 (10) |
C4'B | 0.064 (7) | −0.043 (3) | 1.0025 (13) | 0.036 (7)* | 0.119 (10) |
H4'C | 0.1133 | 0.0035 | 1.0409 | 0.043* | 0.119 (10) |
H4'D | 0.1484 | −0.1207 | 1.0041 | 0.043* | 0.119 (10) |
C5'B | −0.244 (5) | −0.049 (2) | 0.9920 (11) | 0.038 (8)* | 0.119 (10) |
H5'D | −0.3267 | −0.0887 | 1.0287 | 0.057* | 0.119 (10) |
H5'E | −0.2819 | −0.0932 | 0.9526 | 0.057* | 0.119 (10) |
H5'F | −0.3161 | 0.0299 | 0.9881 | 0.057* | 0.119 (10) |
C7 | −0.0519 (12) | 0.6930 (3) | 0.83475 (18) | 0.0924 (17) | |
H7A | −0.1803 | 0.7420 | 0.8577 | 0.139* | |
H7B | −0.0884 | 0.6960 | 0.7885 | 0.139* | |
H7C | 0.1282 | 0.7218 | 0.8430 | 0.139* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0439 (11) | 0.0449 (12) | 0.0398 (10) | −0.0023 (9) | 0.0045 (9) | 0.0010 (9) |
O2 | 0.0802 (18) | 0.0588 (15) | 0.0645 (14) | 0.0010 (13) | 0.0250 (14) | 0.0148 (12) |
O4 | 0.0831 (18) | 0.0673 (15) | 0.0549 (13) | 0.0342 (14) | −0.0025 (13) | −0.0027 (11) |
O1' | 0.0373 (11) | 0.0457 (13) | 0.0525 (12) | 0.0014 (9) | 0.0025 (9) | −0.0052 (11) |
O2' | 0.0365 (11) | 0.0575 (13) | 0.0388 (10) | −0.0012 (11) | −0.0009 (9) | −0.0102 (9) |
C2 | 0.0505 (18) | 0.0443 (17) | 0.0497 (17) | −0.0040 (15) | −0.0004 (15) | 0.0035 (15) |
C3 | 0.071 (2) | 0.0453 (19) | 0.0460 (17) | 0.0060 (18) | −0.0063 (16) | 0.0010 (16) |
C4 | 0.057 (2) | 0.058 (2) | 0.0406 (15) | 0.0203 (18) | −0.0105 (15) | −0.0035 (15) |
C5 | 0.0386 (16) | 0.0567 (19) | 0.0408 (16) | 0.0048 (14) | 0.0013 (13) | −0.0036 (14) |
C6 | 0.0356 (14) | 0.0472 (17) | 0.0356 (14) | −0.0013 (12) | −0.0022 (11) | −0.0066 (12) |
C1' | 0.0315 (13) | 0.0438 (16) | 0.0375 (14) | −0.0017 (12) | −0.0029 (12) | −0.0064 (13) |
C2' | 0.0328 (15) | 0.0548 (19) | 0.0388 (15) | −0.0060 (13) | −0.0019 (12) | −0.0054 (14) |
C3'A | 0.078 (2) | 0.053 (2) | 0.0477 (17) | −0.0177 (19) | 0.0093 (16) | −0.0044 (16) |
C4'A | 0.077 (4) | 0.058 (3) | 0.053 (2) | −0.004 (3) | 0.016 (2) | 0.002 (2) |
C5'A | 0.197 (8) | 0.061 (3) | 0.097 (4) | −0.029 (4) | 0.070 (5) | 0.002 (3) |
C7 | 0.152 (5) | 0.067 (3) | 0.059 (2) | 0.053 (3) | −0.006 (3) | 0.0042 (19) |
O1—C2 | 1.351 (3) | C2'—C3'A | 1.499 (5) |
O1—C6 | 1.458 (3) | C2'—H2' | 0.98 (3) |
O2—C2 | 1.222 (4) | C3'A—C4'A | 1.536 (5) |
O4—C4 | 1.343 (4) | C3'A—H3'A | 0.9900 |
O4—C7 | 1.451 (4) | C3'A—H3'B | 0.9900 |
O1'—C1' | 1.426 (3) | C4'A—C5'A | 1.477 (7) |
O1'—H1'O | 0.85 (3) | C4'A—H4'A | 0.9900 |
O2'—C2' | 1.442 (3) | C4'A—H4'B | 0.9900 |
O2'—H2'O | 0.80 (4) | C5'A—H5'A | 0.9800 |
C2—C3 | 1.447 (5) | C5'A—H5'B | 0.9800 |
C3—C4 | 1.330 (5) | C5'A—H5'C | 0.9800 |
C3—H3 | 0.98 (4) | C4'B—C5'B | 1.57 (4) |
C4—C5 | 1.486 (5) | C4'B—H4'C | 0.9900 |
C5—C6 | 1.513 (4) | C4'B—H4'D | 0.9900 |
C5—H5A | 0.99 (3) | C5'B—H5'D | 0.9800 |
C5—H5B | 0.97 (4) | C5'B—H5'E | 0.9800 |
C6—C1' | 1.504 (4) | C5'B—H5'F | 0.9800 |
C6—H6 | 0.98 (3) | C7—H7A | 0.9800 |
C1'—C2' | 1.524 (4) | C7—H7B | 0.9800 |
C1'—H1' | 0.94 (3) | C7—H7C | 0.9800 |
C2—O1—C6 | 118.7 (2) | C3'A—C2'—H2' | 105.9 (18) |
C4—O4—C7 | 116.9 (3) | C1'—C2'—H2' | 108.6 (17) |
C1'—O1'—H1'O | 102 (3) | C2'—C3'A—C4'A | 112.2 (3) |
C2'—O2'—H2'O | 103 (3) | C2'—C3'A—H3'A | 109.2 |
O2—C2—O1 | 116.3 (3) | C4'A—C3'A—H3'A | 109.2 |
O2—C2—C3 | 124.5 (3) | C2'—C3'A—H3'B | 109.2 |
O1—C2—C3 | 119.2 (3) | C4'A—C3'A—H3'B | 109.2 |
C4—C3—C2 | 119.7 (3) | H3'A—C3'A—H3'B | 107.9 |
C4—C3—H3 | 126 (2) | C5'A—C4'A—C3'A | 112.3 (4) |
C2—C3—H3 | 113 (2) | C5'A—C4'A—H4'A | 109.1 |
C3—C4—O4 | 126.4 (3) | C3'A—C4'A—H4'A | 109.1 |
C3—C4—C5 | 121.1 (3) | C5'A—C4'A—H4'B | 109.1 |
O4—C4—C5 | 112.5 (3) | C3'A—C4'A—H4'B | 109.1 |
C4—C5—C6 | 109.7 (3) | H4'A—C4'A—H4'B | 107.9 |
C4—C5—H5A | 108.2 (17) | C4'A—C5'A—H5'A | 109.5 |
C6—C5—H5A | 108.9 (19) | C4'A—C5'A—H5'B | 109.5 |
C4—C5—H5B | 110.5 (19) | H5'A—C5'A—H5'B | 109.5 |
C6—C5—H5B | 109 (2) | C4'A—C5'A—H5'C | 109.5 |
H5A—C5—H5B | 110 (3) | H5'A—C5'A—H5'C | 109.5 |
O1—C6—C1' | 105.3 (2) | H5'B—C5'A—H5'C | 109.5 |
O1—C6—C5 | 110.2 (2) | C5'B—C4'B—H4'C | 112.8 |
C1'—C6—C5 | 115.3 (2) | C5'B—C4'B—H4'D | 112.8 |
O1—C6—H6 | 106.3 (15) | H4'C—C4'B—H4'D | 110.3 |
C1'—C6—H6 | 110.7 (15) | C4'B—C5'B—H5'D | 109.5 |
C5—C6—H6 | 108.7 (15) | C4'B—C5'B—H5'E | 109.5 |
O1'—C1'—C6 | 106.9 (2) | H5'D—C5'B—H5'E | 109.5 |
O1'—C1'—C2' | 111.5 (2) | C4'B—C5'B—H5'F | 109.5 |
C6—C1'—C2' | 113.4 (2) | H5'D—C5'B—H5'F | 109.5 |
O1'—C1'—H1' | 112.6 (16) | H5'E—C5'B—H5'F | 109.5 |
C6—C1'—H1' | 106.5 (15) | O4—C7—H7A | 109.5 |
C2'—C1'—H1' | 106.0 (16) | O4—C7—H7B | 109.5 |
O2'—C2'—C3'A | 110.9 (3) | H7A—C7—H7B | 109.5 |
O2'—C2'—C1' | 109.1 (2) | O4—C7—H7C | 109.5 |
C3'A—C2'—C1' | 113.1 (3) | H7A—C7—H7C | 109.5 |
O2'—C2'—H2' | 109.1 (18) | H7B—C7—H7C | 109.5 |
C6—O1—C2—O2 | 170.8 (3) | C4—C5—C6—C1' | −169.6 (2) |
C6—O1—C2—C3 | −11.9 (4) | O1—C6—C1'—O1' | 64.9 (3) |
O2—C2—C3—C4 | 162.4 (3) | C5—C6—C1'—O1' | −173.5 (2) |
O1—C2—C3—C4 | −14.7 (5) | O1—C6—C1'—C2' | −171.8 (2) |
C2—C3—C4—O4 | −174.4 (3) | C5—C6—C1'—C2' | −50.2 (3) |
C2—C3—C4—C5 | 4.7 (5) | O1'—C1'—C2'—O2' | 68.4 (3) |
C7—O4—C4—C3 | 0.3 (5) | C6—C1'—C2'—O2' | −52.4 (3) |
C7—O4—C4—C5 | −178.8 (3) | O1'—C1'—C2'—C3'A | −55.5 (3) |
C3—C4—C5—C6 | 28.2 (4) | C6—C1'—C2'—C3'A | −176.2 (3) |
O4—C4—C5—C6 | −152.6 (3) | O2'—C2'—C3'A—C4'A | 63.0 (4) |
C2—O1—C6—C1' | 169.7 (2) | C1'—C2'—C3'A—C4'A | −174.2 (3) |
C2—O1—C6—C5 | 44.8 (3) | C2'—C3'A—C4'A—C5'A | 175.7 (5) |
C4—C5—C6—O1 | −50.7 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1′—H1′O···O2i | 0.85 (3) | 1.93 (3) | 2.778 (3) | 177 (3) |
O2′—H2′O···O2′ii | 0.80 (4) | 2.05 (4) | 2.8178 (18) | 163 (4) |
Symmetry codes: (i) −x+1, y−1/2, −z+3/2; (ii) x−1/2, −y+1/2, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1'—H1'O···O2i | 0.85 (3) | 1.93 (3) | 2.778 (3) | 177 (3) |
O2'—H2'O···O2'ii | 0.80 (4) | 2.05 (4) | 2.8178 (18) | 163 (4) |
Symmetry codes: (i) −x+1, y−1/2, −z+3/2; (ii) x−1/2, −y+1/2, −z+2. |
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The title compound was first isolated from an unidentified Penicillium sp. (McGahren et al., 1973). Multiple routes have been reported for the total synthesis (Kirihata et al., 1990; Kirihata et al., 1992a; Masaki et al., 1994) including syntheses creating unnatral stereoisomers (Kirihata et al., 1992b). Closely related products have been reported from other fungi (Kirihata et al., 1996; Lee et al., 1995). The 6-substituted 5,6-dihydropyran-2-one moiety present in the title compound is also found in natural products from several species of plants and fungi (Davies-Coleman & Rivett, 1989). Although many structures with this moiety exhibit bioactivity, it appears that the title compound displays none of the reported activities. Notably, the gibberellin synergistic activity of the very closely related compound pestalotin is not found (Kimura et al., 1986; Venkatasubbaiah & Van Dyke, 1991). In our lab we observed moderate antifungal activity. Crystal structures for the related natural products, kavain, dihydrokavain and methysticin have been reported (Yoshino & Nowacki, 1972; Engel & Nowacki, 1972a; Engel & Nowacki, 1972b). In the title compound, the atoms of the pyran-2-one assume a half-chair conformation. The conformations of the methoxy and dihydroxypentyl groups are shown in Fig. 1. Carbons 4' and 5' are disordered over two sites with occupancies of 0.881 (10):0.119 (10). In the crystal, molecules are linked via O—H···O hydrogen bonds forming a three-dimensional network (see Table 1 and Fig. 2).