organic compounds
2C-Methyl-D-arabinono-1,4-lactone monohydrate
aDipartimento di Scienze Chimiche, Facoltà di Farmacia, Università di Catania, Viale A. Doria 6, 95125 Catania, Italy, bDepartment of Chemical Crystallography, Chemical Research Laboratory, Mansfield Road, Oxford OX1 3TA, England, and cDepartment of Organic Chemistry, Chemical Research Laboratory, Mansfield Road, Oxford OX1 3TA, England
*Correspondence e-mail: francesco.punzo@chemistry.oxford.ac.uk
The title compound, C6H10O5·H2O, formed by the hydrolysis of a δ-lactone, is shown unequivocally to be a γ-lactone. The diol has a trans configuration.
Comment
The potential of the Kiliani ascension of et al., 2004). A further class of branched carbohydrate building blocks may be available from the reaction of cyanide on 1-deoxyketoses, themselves prepared by addition of organometallic reagents to sugar The protected 1-deoxy-D-ribulose, (1), was treated with sodium cyanide and gave a single diastereomeric product, (2), the structure of which was established by X-ray crystallography (Punzo et al., 2005). During the isolation of (2), some loss of the protecting acetonide group afforded an unprotected lactone (3), which was eventually crystallized. NMR and other structural studies on (3) could not firmly determine the size of the lactone ring; X-ray crystallographic analysis established that (3) is a 1,4-lactone (Fig. 1). It is noteworthy that none of the epimeric ribonolactone, (4), was isolated during the course of the synthesis. As usually expected for sugar derivatives, hydrogen bonding (Table 2) occurs between molecules, and the water of crystallization is involved in this network (Fig. 2).
to provide readily available branched scaffolds has been recognized (HotchkissExperimental
Compound (3) was crystallized by dissolving it in diethyl ether, adding a few drops of cyclohexane and allowing the slow competitive evaporation of the two solvents until clear colourless crystals formed. Water was used as solvent during the synthesis of the compound. Moreover the compound was exposed to air before and after crystallization.
Crystal data
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Refinement
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In the absence of significant D-erythronolactone with known H atoms were located in difference density maps. Those attached to C atoms were repositioned geometrically. The H atoms were initially refined with soft restraints on the bond lengths and angles to regularize their geometry (C—H = 0.97–1.01 Å and O—H = 0.91–0.97 Å), after which they were refined as riding, with Uiso(H) = 1.2Ueq(C) and Uiso(H) = 0.05 Å2 for those bonded to the O atoms.
Friedel pairs were merged. The was assigned since the starting material wasData collection: COLLECT (Nonius, 2001); cell DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.
Supporting information
https://doi.org/10.1107/S1600536805000723/ob6460sup1.cif
contains datablocks global, 3. DOI:Structure factors: contains datablock 3. DOI: https://doi.org/10.1107/S1600536805000723/ob64603sup2.hkl
Data collection: COLLECT (Nonius, 2001); cell
DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: CAMERON (Watkin et al., 1996); software used to prepare material for publication: CRYSTALS.C6H10O5·H2O | Dx = 1.477 Mg m−3 |
Mr = 180.16 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, P212121 | Cell parameters from 1300 reflections |
a = 8.1624 (3) Å | θ = 5–30° |
b = 8.5569 (3) Å | µ = 0.13 mm−1 |
c = 11.6000 (5) Å | T = 120 K |
V = 810.20 (5) Å3 | Plate, colourless |
Z = 4 | 0.30 × 0.20 × 0.04 mm |
F(000) = 384 |
Nonius KappaCCD diffractometer | 1201 reflections with I > 2u(I) |
Graphite monochromator | Rint = 0.013 |
ω scans | θmax = 30.0°, θmin = 5.3° |
Absorption correction: multi-scan (DENZO/SCALEPACK; Otwinowski & Minor, 1997) | h = −11→11 |
Tmin = 0.97, Tmax = 0.99 | k = −11→12 |
2296 measured reflections | l = −16→16 |
1361 independent reflections |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.031 | H-atom parameters constrained |
wR(F2) = 0.071 | w = 1/[σ2(F2) + 0.03 + 0.17P], where P = [max(Fo2,0) + 2Fc2]/3 |
S = 0.98 | (Δ/σ)max = 0.000246 |
1361 reflections | Δρmax = 0.23 e Å−3 |
109 parameters | Δρmin = −0.24 e Å−3 |
0 restraints | Absolute structure: see text |
x | y | z | Uiso*/Ueq | ||
C1 | 0.77461 (19) | 0.14456 (17) | 0.69407 (12) | 0.0165 | |
C2 | 0.64570 (18) | 0.21334 (16) | 0.77623 (13) | 0.0168 | |
C3 | 0.63386 (19) | 0.08861 (18) | 0.86979 (13) | 0.0181 | |
O4 | 0.66325 (13) | −0.05809 (12) | 0.80726 (9) | 0.0179 | |
C5 | 0.73681 (18) | −0.02955 (17) | 0.70652 (13) | 0.0165 | |
O6 | 0.76709 (13) | −0.13251 (12) | 0.63819 (9) | 0.0197 | |
C7 | 0.4700 (2) | 0.0739 (2) | 0.93035 (13) | 0.0213 | |
O8 | 0.33569 (13) | 0.06498 (13) | 0.85204 (10) | 0.0220 | |
O9 | 0.68542 (15) | 0.35975 (12) | 0.82592 (9) | 0.0220 | |
O10 | 0.76159 (13) | 0.19458 (12) | 0.57800 (8) | 0.0194 | |
C11 | 0.95038 (18) | 0.1741 (2) | 0.73335 (14) | 0.0230 | |
O12 | 0.47338 (14) | 0.06611 (15) | 0.50844 (10) | 0.0282 | |
H21 | 0.5406 | 0.2174 | 0.7354 | 0.0207* | |
H31 | 0.7252 | 0.1002 | 0.9253 | 0.0238* | |
H71 | 0.4532 | 0.1665 | 0.9824 | 0.0260* | |
H72 | 0.4727 | −0.0243 | 0.9782 | 0.0260* | |
H111 | 1.0219 | 0.1159 | 0.6815 | 0.0286* | |
H112 | 0.9699 | 0.2875 | 0.7284 | 0.0286* | |
H113 | 0.9610 | 0.1360 | 0.8114 | 0.0286* | |
H5 | 0.6643 | 0.1552 | 0.5515 | 0.0500* | |
H7 | 0.2885 | 0.1680 | 0.8411 | 0.0500* | |
H9 | 0.6767 | 0.4424 | 0.7698 | 0.0500* | |
H12 | 0.4229 | −0.0145 | 0.5497 | 0.0500* | |
H1 | 0.3899 | 0.1193 | 0.4735 | 0.0500* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0184 (7) | 0.0167 (6) | 0.0144 (6) | −0.0014 (6) | −0.0008 (6) | 0.0019 (6) |
C2 | 0.0178 (7) | 0.0151 (6) | 0.0175 (6) | −0.0019 (6) | 0.0000 (6) | −0.0012 (6) |
C3 | 0.0218 (7) | 0.0172 (7) | 0.0153 (7) | 0.0006 (6) | −0.0013 (6) | −0.0010 (6) |
O4 | 0.0221 (5) | 0.0148 (5) | 0.0169 (5) | 0.0015 (4) | 0.0016 (4) | 0.0004 (4) |
C5 | 0.0129 (6) | 0.0182 (7) | 0.0184 (7) | 0.0009 (6) | −0.0036 (6) | 0.0017 (5) |
O6 | 0.0227 (5) | 0.0167 (5) | 0.0198 (5) | 0.0013 (5) | 0.0001 (5) | −0.0019 (4) |
C7 | 0.0232 (7) | 0.0222 (7) | 0.0185 (7) | −0.0007 (7) | 0.0014 (6) | 0.0007 (7) |
O8 | 0.0203 (5) | 0.0186 (5) | 0.0270 (6) | 0.0006 (5) | −0.0003 (5) | −0.0015 (5) |
O9 | 0.0304 (6) | 0.0151 (5) | 0.0205 (5) | −0.0022 (5) | 0.0002 (5) | −0.0031 (4) |
O10 | 0.0236 (5) | 0.0196 (5) | 0.0150 (5) | −0.0026 (5) | −0.0009 (4) | 0.0019 (4) |
C11 | 0.0190 (7) | 0.0258 (8) | 0.0242 (8) | −0.0028 (7) | −0.0033 (6) | 0.0003 (7) |
O12 | 0.0221 (5) | 0.0318 (6) | 0.0307 (6) | −0.0026 (6) | −0.0065 (5) | 0.0094 (6) |
C1—C2 | 1.537 (2) | C7—O8 | 1.4261 (19) |
C1—C5 | 1.528 (2) | C7—H71 | 1.006 |
C1—O10 | 1.4169 (17) | C7—H72 | 1.007 |
C1—C11 | 1.526 (2) | O8—H7 | 0.970 |
C2—C3 | 1.525 (2) | O9—H9 | 0.964 |
C2—O9 | 1.4167 (18) | O10—H5 | 0.916 |
C2—H21 | 0.980 | C11—H111 | 0.975 |
C3—O4 | 1.4695 (18) | C11—H112 | 0.985 |
C3—C7 | 1.516 (2) | C11—H113 | 0.967 |
C3—H31 | 0.990 | O12—H12 | 0.935 |
O4—C5 | 1.3363 (18) | O12—H1 | 0.914 |
C5—O6 | 1.2106 (17) | ||
C2—C1—C5 | 100.17 (12) | C1—C5—O4 | 110.58 (12) |
C2—C1—O10 | 114.98 (12) | C1—C5—O6 | 127.33 (14) |
C5—C1—O10 | 111.66 (12) | O4—C5—O6 | 122.09 (13) |
C2—C1—C11 | 113.27 (12) | C3—C7—O8 | 112.81 (12) |
C5—C1—C11 | 108.84 (13) | C3—C7—H71 | 109.5 |
O10—C1—C11 | 107.71 (12) | O8—C7—H71 | 108.6 |
C1—C2—C3 | 102.51 (12) | C3—C7—H72 | 107.8 |
C1—C2—O9 | 115.74 (12) | O8—C7—H72 | 108.8 |
C3—C2—O9 | 110.11 (12) | H71—C7—H72 | 109.3 |
C1—C2—H21 | 108.3 | C7—O8—H7 | 109.9 |
C3—C2—H21 | 108.2 | C2—O9—H9 | 110.9 |
O9—C2—H21 | 111.4 | C1—O10—H5 | 105.8 |
C2—C3—O4 | 103.66 (11) | C1—C11—H111 | 107.1 |
C2—C3—C7 | 116.35 (13) | C1—C11—H112 | 107.3 |
O4—C3—C7 | 107.56 (12) | H111—C11—H112 | 111.8 |
C2—C3—H31 | 110.2 | C1—C11—H113 | 107.9 |
O4—C3—H31 | 106.5 | H111—C11—H113 | 110.6 |
C7—C3—H31 | 111.8 | H112—C11—H113 | 111.9 |
C3—O4—C5 | 110.42 (11) | H12—O12—H1 | 105.4 |
D—H···A | D—H | H···A | D···A | D—H···A |
O10—H5···O12 | 0.92 | 1.81 | 2.7191 (16) | 175 |
O8—H7···O6i | 0.97 | 1.78 | 2.7235 (15) | 163 |
O9—H9···O8i | 0.96 | 1.76 | 2.7157 (15) | 169 |
O12—H12···O9ii | 0.94 | 2.01 | 2.9138 (16) | 163 |
O12—H1···O10iii | 0.91 | 2.00 | 2.8613 (16) | 157 |
Symmetry codes: (i) −x+1, y+1/2, −z+3/2; (ii) −x+1, y−1/2, −z+3/2; (iii) x−1/2, −y+1/2, −z+1. |
Footnotes
‡Visiting Scientist at the Department of Chemical Crystallography, Chemical Research Laboratory, Mansfield Road, Oxford OX1 3TA, England.
References
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