organic compounds
(2R,4R)-3-(tert-Butoxycarbonyl)-2-(3-chlorophenyl)-1,3-thiazolidine-4-carboxylic acid monohydrate
aBioengineering Department, Zhejiang Traditional Chinese Medicine University, Hangzhou 310053, People's Republic of China
*Correspondence e-mail: songzhongcheng@gmail.com
In the title compound, C15H18ClNO4S·H2O, the thiazolidine ring displays a half-chair conformation. In the crystal, the water molecules are linked to the organic acid molecules via intermolecular O—H⋯O hydrogen bonds.
Related literature
For applications of thiazolidine derivatives, see: Kallen (1971); Seki et al. (2004); Song et al. (2009).
Experimental
Crystal data
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Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810042133/xu5054sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810042133/xu5054Isup2.hkl
Cysteine (0.121 g, 1.0 mmol) and appropriate aldehyde (1.0 mmol) in ethanol (25 ml) was stirred at room temperature for 8 h, and the solid separated was collected, washed with diethyl ether and dried to obtain (2RS,4R)-2-(3-chlorophenyl)thiazolidine-4-carboxylic acid (TCA). A mixture of TCA (1.0 mmol) and appropriate NaOH (10%, 1.0 mmol) in dioxane (25 ml) was stirred at ice-water temperature for 2 h. BOC2O (1.0 mmol) was added and stirred at ice-water temperature for 1 h and then at room temperature for 5 h. Most of the solvent was extracted and appropriate amount of water was added to adjust to neutral pH value. Ethyl acetate was added and extracted (50 ml), and washed with appropriate saturated aqueous solution of common salt, and dried with anhydrous magnesium sulfate. Solvent was extracted to dry to obtain whiter solids (2R,4R)-3-(tert-butoxycarbonyl)-2-(3-chlorophenyl)thiazolidine-4-carboxylic acid hydrate
H atoms were positioned geometrically and refined using the riding-model approximation, with C–H = 0.93–0.97 Å, O–H = 0.82–0.85 Å, and Uiso(H) = 1.2Ueq(C,O) or Uiso(H) = 1.5Ueq(methyl C).
The steric course of the reaction between L-cysteine and
deserved much attention because this reaction had been implicated in several biochemical processes (Kallen, 1971). An analogous condensation reaction constituted the first step in the syntheses of important natural products, such as penicillin and biotin (Seki et al., 2004). Therefore, thiazolidine derivatives have become especially noteworthy in recent years (Song et al. 2009). In the present work, the structure of the title new compound is reported.The compound consists of a (2R,4R)-3-(tert-butoxycarbonyl)-2-(3-chlorophenyl)thiazolidine-4-carboxylic acid molecule and a water molecule of crystallization (Fig. 1). The torsion angles C12—O4—C11—O3, C12—O4—C11—N1, and N1—C1—C2—S1 are 3.2 (5), 5.5 (5), and 37.1 (5)°, respectively. The S1 atom is located 0.762 (6)Å from the least-squares plane defined by C2/C1/N1/C3. In the
the (2R,4R)-3-(tert-butoxycarbonyl)-2- (3-chlorophenyl)thiazolidine-4-carboxylic acid molecules are linked by water molecules through intermolecular O–H···O hydrogen bonds (Table 1), forming chains running along the b axis (Fig. 2).For applications of thiazolidine derivatives, see: Kallen (1971); Seki et al. (2004); Song et al. (2009).
Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell
CAD-4 EXPRESS (Enraf–Nonius, 1994); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C15H18ClNO4S·H2O | F(000) = 380 |
Mr = 361.83 | Dx = 1.367 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2yb | Cell parameters from 25 reflections |
a = 8.2460 (16) Å | θ = 9–12° |
b = 5.9660 (12) Å | µ = 0.36 mm−1 |
c = 18.132 (4) Å | T = 293 K |
β = 99.81 (3)° | Block, colorless |
V = 879.0 (3) Å3 | 0.20 × 0.17 × 0.15 mm |
Z = 2 |
Enraf–Nonius CAD-4 diffractometer | 2169 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.080 |
Graphite monochromator | θmax = 25.3°, θmin = 1.1° |
ω/2θ scans | h = 0→9 |
Absorption correction: ψ scan (ABSCOR; Higashi, 1995) | k = −7→7 |
Tmin = 0.932, Tmax = 0.948 | l = −21→21 |
3417 measured reflections | 3 standard reflections every 200 reflections |
3182 independent reflections | intensity decay: 1% |
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)] = 0.068 | H-atom parameters constrained |
wR(F2) = 0.167 | w = 1/[σ2(Fo2) + (0.0664P)2 + 0.2379P] where P = (Fo2 + 2Fc2)/3 |
S = 1.03 | (Δ/σ)max = 0.001 |
3182 reflections | Δρmax = 0.19 e Å−3 |
208 parameters | Δρmin = −0.28 e Å−3 |
1 restraint | Absolute structure: Flack (1983), 1451 Friedel pairs |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.11 (16) |
C15H18ClNO4S·H2O | V = 879.0 (3) Å3 |
Mr = 361.83 | Z = 2 |
Monoclinic, P21 | Mo Kα radiation |
a = 8.2460 (16) Å | µ = 0.36 mm−1 |
b = 5.9660 (12) Å | T = 293 K |
c = 18.132 (4) Å | 0.20 × 0.17 × 0.15 mm |
β = 99.81 (3)° |
Enraf–Nonius CAD-4 diffractometer | 2169 reflections with I > 2σ(I) |
Absorption correction: ψ scan (ABSCOR; Higashi, 1995) | Rint = 0.080 |
Tmin = 0.932, Tmax = 0.948 | 3 standard reflections every 200 reflections |
3417 measured reflections | intensity decay: 1% |
3182 independent reflections |
R[F2 > 2σ(F2)] = 0.068 | H-atom parameters constrained |
wR(F2) = 0.167 | Δρmax = 0.19 e Å−3 |
S = 1.03 | Δρmin = −0.28 e Å−3 |
3182 reflections | Absolute structure: Flack (1983), 1451 Friedel pairs |
208 parameters | Absolute structure parameter: −0.11 (16) |
1 restraint |
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 | ||
S1 | −0.27417 (18) | 0.2513 (3) | 0.65551 (8) | 0.0556 (4) | |
Cl | 0.2514 (3) | 0.2819 (5) | 0.47181 (11) | 0.1051 (8) | |
N1 | −0.0494 (5) | 0.1770 (7) | 0.7725 (2) | 0.0353 (10) | |
O1 | −0.0704 (5) | −0.2937 (7) | 0.8136 (2) | 0.0621 (12) | |
C1 | −0.1971 (6) | 0.0662 (9) | 0.7899 (3) | 0.0379 (13) | |
H1A | −0.2563 | 0.1677 | 0.8185 | 0.045* | |
O2 | −0.2241 (5) | −0.1623 (7) | 0.8928 (2) | 0.0531 (11) | |
H2C | −0.1984 | −0.2805 | 0.9148 | 0.080* | |
C2 | −0.3015 (7) | 0.0154 (11) | 0.7147 (3) | 0.0519 (16) | |
H2A | −0.4163 | −0.0005 | 0.7195 | 0.062* | |
H2B | −0.2653 | −0.1222 | 0.6940 | 0.062* | |
O3 | 0.0636 (4) | 0.1875 (6) | 0.89459 (18) | 0.0422 (9) | |
C3 | −0.0548 (6) | 0.2640 (10) | 0.6970 (3) | 0.0415 (12) | |
H3A | −0.0212 | 0.4217 | 0.7007 | 0.050* | |
O4 | 0.1931 (4) | 0.3384 (6) | 0.80485 (18) | 0.0407 (9) | |
C4 | 0.0541 (7) | 0.1417 (9) | 0.6516 (3) | 0.0395 (13) | |
C5 | 0.0950 (7) | 0.2482 (12) | 0.5896 (3) | 0.0505 (14) | |
H5C | 0.0531 | 0.3897 | 0.5759 | 0.061* | |
C6 | 0.1987 (8) | 0.1427 (12) | 0.5482 (3) | 0.0592 (17) | |
C7 | 0.2659 (8) | −0.0660 (13) | 0.5677 (4) | 0.0651 (19) | |
H7A | 0.3366 | −0.1334 | 0.5394 | 0.078* | |
C8 | 0.2260 (8) | −0.1720 (11) | 0.6297 (3) | 0.0590 (17) | |
H8A | 0.2689 | −0.3131 | 0.6433 | 0.071* | |
C9 | 0.1218 (7) | −0.0688 (10) | 0.6721 (3) | 0.0487 (15) | |
H9A | 0.0970 | −0.1402 | 0.7144 | 0.058* | |
C10 | −0.1541 (6) | −0.1503 (10) | 0.8333 (3) | 0.0390 (13) | |
C11 | 0.0700 (6) | 0.2343 (9) | 0.8296 (3) | 0.0366 (11) | |
C12 | 0.3466 (7) | 0.4010 (9) | 0.8560 (3) | 0.0424 (14) | |
C13 | 0.4314 (7) | 0.1879 (12) | 0.8896 (4) | 0.0663 (19) | |
H13A | 0.3687 | 0.1236 | 0.9243 | 0.099* | |
H13B | 0.5400 | 0.2238 | 0.9152 | 0.099* | |
H13C | 0.4388 | 0.0823 | 0.8504 | 0.099* | |
C14 | 0.4440 (8) | 0.5092 (12) | 0.8017 (4) | 0.0635 (19) | |
H14A | 0.3894 | 0.6438 | 0.7819 | 0.095* | |
H14B | 0.4516 | 0.4071 | 0.7615 | 0.095* | |
H14C | 0.5525 | 0.5451 | 0.8274 | 0.095* | |
C15 | 0.3093 (9) | 0.5670 (12) | 0.9141 (4) | 0.073 (2) | |
H15A | 0.2574 | 0.6973 | 0.8894 | 0.110* | |
H15B | 0.4099 | 0.6100 | 0.9457 | 0.110* | |
H15C | 0.2369 | 0.4989 | 0.9438 | 0.110* | |
O5 | 0.8493 (5) | 0.4638 (7) | 0.9669 (2) | 0.0585 (12) | |
H5B | 0.7943 | 0.4847 | 1.0019 | 0.070* | |
H5A | 0.9053 | 0.3446 | 0.9659 | 0.070* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0481 (8) | 0.0689 (11) | 0.0474 (8) | 0.0106 (9) | 0.0013 (6) | 0.0065 (8) |
Cl | 0.1239 (18) | 0.130 (2) | 0.0752 (12) | 0.0239 (16) | 0.0570 (12) | 0.0417 (14) |
N1 | 0.041 (2) | 0.034 (2) | 0.030 (2) | −0.003 (2) | 0.0042 (19) | −0.0031 (19) |
O1 | 0.076 (3) | 0.049 (3) | 0.069 (3) | 0.013 (2) | 0.031 (2) | 0.005 (2) |
C1 | 0.037 (3) | 0.038 (3) | 0.040 (3) | −0.002 (2) | 0.011 (2) | −0.004 (2) |
O2 | 0.061 (3) | 0.048 (3) | 0.055 (2) | 0.005 (2) | 0.021 (2) | 0.012 (2) |
C2 | 0.042 (3) | 0.061 (4) | 0.052 (4) | −0.007 (3) | 0.005 (3) | −0.006 (3) |
O3 | 0.047 (2) | 0.046 (2) | 0.034 (2) | −0.0027 (18) | 0.0101 (16) | 0.0039 (17) |
C3 | 0.046 (3) | 0.035 (3) | 0.041 (3) | −0.001 (3) | 0.001 (2) | −0.001 (3) |
O4 | 0.042 (2) | 0.041 (2) | 0.0399 (19) | −0.0063 (18) | 0.0093 (16) | −0.0023 (18) |
C4 | 0.042 (3) | 0.040 (3) | 0.035 (3) | −0.001 (3) | 0.002 (2) | −0.002 (3) |
C5 | 0.061 (4) | 0.046 (3) | 0.047 (3) | 0.001 (3) | 0.017 (3) | 0.003 (3) |
C6 | 0.064 (4) | 0.070 (5) | 0.045 (4) | 0.000 (4) | 0.014 (3) | 0.006 (3) |
C7 | 0.063 (4) | 0.082 (5) | 0.054 (4) | 0.011 (4) | 0.023 (3) | −0.008 (4) |
C8 | 0.077 (4) | 0.049 (4) | 0.055 (4) | 0.015 (3) | 0.023 (3) | 0.000 (3) |
C9 | 0.059 (4) | 0.051 (4) | 0.039 (3) | 0.003 (3) | 0.016 (3) | 0.006 (3) |
C10 | 0.035 (3) | 0.041 (3) | 0.042 (3) | −0.003 (3) | 0.006 (2) | −0.002 (3) |
C11 | 0.044 (3) | 0.027 (3) | 0.041 (3) | 0.006 (3) | 0.012 (2) | 0.000 (2) |
C12 | 0.037 (3) | 0.039 (3) | 0.051 (3) | −0.010 (3) | 0.004 (3) | −0.001 (3) |
C13 | 0.044 (3) | 0.066 (5) | 0.086 (5) | 0.003 (3) | 0.004 (3) | 0.023 (4) |
C14 | 0.052 (4) | 0.059 (4) | 0.080 (5) | −0.014 (3) | 0.009 (4) | 0.017 (4) |
C15 | 0.079 (5) | 0.067 (5) | 0.071 (5) | −0.021 (4) | 0.004 (4) | −0.021 (4) |
O5 | 0.079 (3) | 0.047 (3) | 0.054 (3) | 0.008 (2) | 0.024 (2) | 0.006 (2) |
S1—C2 | 1.807 (6) | C5—H5C | 0.9300 |
S1—C3 | 1.838 (5) | C6—C7 | 1.384 (10) |
Cl—C6 | 1.733 (6) | C7—C8 | 1.379 (9) |
N1—C11 | 1.346 (6) | C7—H7A | 0.9300 |
N1—C3 | 1.457 (6) | C8—C9 | 1.390 (8) |
N1—C1 | 1.466 (6) | C8—H8A | 0.9300 |
O1—C10 | 1.192 (6) | C9—H9A | 0.9300 |
C1—C2 | 1.513 (7) | C12—C15 | 1.515 (8) |
C1—C10 | 1.524 (7) | C12—C14 | 1.516 (8) |
C1—H1A | 0.9800 | C12—C13 | 1.527 (8) |
O2—C10 | 1.309 (6) | C13—H13A | 0.9600 |
O2—H2C | 0.8200 | C13—H13B | 0.9600 |
C2—H2A | 0.9700 | C13—H13C | 0.9600 |
C2—H2B | 0.9700 | C14—H14A | 0.9600 |
O3—C11 | 1.221 (6) | C14—H14B | 0.9600 |
C3—C4 | 1.505 (7) | C14—H14C | 0.9600 |
C3—H3A | 0.9800 | C15—H15A | 0.9600 |
O4—C11 | 1.332 (6) | C15—H15B | 0.9600 |
O4—C12 | 1.483 (6) | C15—H15C | 0.9600 |
C4—C5 | 1.383 (8) | O5—H5B | 0.8499 |
C4—C9 | 1.398 (8) | O5—H5A | 0.8500 |
C5—C6 | 1.382 (8) | ||
C2—S1—C3 | 90.2 (3) | C7—C8—H8A | 119.9 |
C11—N1—C3 | 122.2 (4) | C9—C8—H8A | 119.9 |
C11—N1—C1 | 118.3 (4) | C8—C9—C4 | 120.5 (5) |
C3—N1—C1 | 118.0 (4) | C8—C9—H9A | 119.7 |
N1—C1—C2 | 105.2 (4) | C4—C9—H9A | 119.7 |
N1—C1—C10 | 111.4 (4) | O1—C10—O2 | 124.6 (5) |
C2—C1—C10 | 110.0 (5) | O1—C10—C1 | 123.3 (5) |
N1—C1—H1A | 110.0 | O2—C10—C1 | 112.1 (5) |
C2—C1—H1A | 110.0 | O3—C11—O4 | 126.3 (5) |
C10—C1—H1A | 110.0 | O3—C11—N1 | 122.6 (5) |
C10—O2—H2C | 109.5 | O4—C11—N1 | 111.1 (4) |
C1—C2—S1 | 105.6 (4) | O4—C12—C15 | 110.3 (5) |
C1—C2—H2A | 110.6 | O4—C12—C14 | 101.0 (4) |
S1—C2—H2A | 110.6 | C15—C12—C14 | 111.5 (5) |
C1—C2—H2B | 110.6 | O4—C12—C13 | 108.9 (4) |
S1—C2—H2B | 110.6 | C15—C12—C13 | 113.6 (5) |
H2A—C2—H2B | 108.7 | C14—C12—C13 | 110.9 (5) |
N1—C3—C4 | 114.5 (4) | C12—C13—H13A | 109.5 |
N1—C3—S1 | 103.9 (3) | C12—C13—H13B | 109.5 |
C4—C3—S1 | 113.2 (4) | H13A—C13—H13B | 109.5 |
N1—C3—H3A | 108.3 | C12—C13—H13C | 109.5 |
C4—C3—H3A | 108.3 | H13A—C13—H13C | 109.5 |
S1—C3—H3A | 108.3 | H13B—C13—H13C | 109.5 |
C11—O4—C12 | 121.7 (4) | C12—C14—H14A | 109.5 |
C5—C4—C9 | 119.1 (5) | C12—C14—H14B | 109.5 |
C5—C4—C3 | 118.2 (5) | H14A—C14—H14B | 109.5 |
C9—C4—C3 | 122.6 (5) | C12—C14—H14C | 109.5 |
C6—C5—C4 | 119.5 (6) | H14A—C14—H14C | 109.5 |
C6—C5—H5C | 120.3 | H14B—C14—H14C | 109.5 |
C4—C5—H5C | 120.3 | C12—C15—H15A | 109.5 |
C5—C6—C7 | 121.9 (6) | C12—C15—H15B | 109.5 |
C5—C6—Cl | 118.6 (5) | H15A—C15—H15B | 109.5 |
C7—C6—Cl | 119.4 (5) | C12—C15—H15C | 109.5 |
C8—C7—C6 | 118.6 (6) | H15A—C15—H15C | 109.5 |
C8—C7—H7A | 120.7 | H15B—C15—H15C | 109.5 |
C6—C7—H7A | 120.7 | H5B—O5—H5A | 120.0 |
C7—C8—C9 | 120.3 (6) | ||
C11—N1—C1—C2 | −177.5 (5) | C4—C5—C6—Cl | −178.7 (5) |
C3—N1—C1—C2 | 16.0 (6) | C5—C6—C7—C8 | 0.9 (11) |
C11—N1—C1—C10 | −58.3 (6) | Cl—C6—C7—C8 | 178.4 (5) |
C3—N1—C1—C10 | 135.3 (5) | C6—C7—C8—C9 | −0.8 (10) |
N1—C1—C2—S1 | −37.1 (5) | C7—C8—C9—C4 | 1.1 (10) |
C10—C1—C2—S1 | −157.2 (4) | C5—C4—C9—C8 | −1.5 (9) |
C3—S1—C2—C1 | 39.2 (4) | C3—C4—C9—C8 | −177.9 (5) |
C11—N1—C3—C4 | 82.2 (6) | N1—C1—C10—O1 | −51.4 (7) |
C1—N1—C3—C4 | −111.8 (5) | C2—C1—C10—O1 | 64.9 (7) |
C11—N1—C3—S1 | −153.8 (4) | N1—C1—C10—O2 | 130.8 (5) |
C1—N1—C3—S1 | 12.1 (5) | C2—C1—C10—O2 | −112.9 (5) |
C2—S1—C3—N1 | −29.0 (4) | C12—O4—C11—O3 | 3.2 (8) |
C2—S1—C3—C4 | 95.7 (4) | C12—O4—C11—N1 | −174.5 (4) |
N1—C3—C4—C5 | −161.1 (5) | C3—N1—C11—O3 | 169.7 (5) |
S1—C3—C4—C5 | 80.0 (6) | C1—N1—C11—O3 | 3.9 (7) |
N1—C3—C4—C9 | 15.4 (8) | C3—N1—C11—O4 | −12.4 (6) |
S1—C3—C4—C9 | −103.5 (6) | C1—N1—C11—O4 | −178.3 (4) |
C9—C4—C5—C6 | 1.5 (9) | C11—O4—C12—C15 | −62.5 (6) |
C3—C4—C5—C6 | 178.1 (5) | C11—O4—C12—C14 | 179.5 (5) |
C4—C5—C6—C7 | −1.2 (10) | C11—O4—C12—C13 | 62.7 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2C···O5i | 0.82 | 1.80 | 2.620 (6) | 177 |
O5—H5A···O3ii | 0.85 | 2.20 | 2.890 (5) | 139 |
O5—H5B···O3iii | 0.85 | 2.37 | 2.827 (5) | 114 |
Symmetry codes: (i) x−1, y−1, z; (ii) x+1, y, z; (iii) −x+1, y+1/2, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C15H18ClNO4S·H2O |
Mr | 361.83 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 293 |
a, b, c (Å) | 8.2460 (16), 5.9660 (12), 18.132 (4) |
β (°) | 99.81 (3) |
V (Å3) | 879.0 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.36 |
Crystal size (mm) | 0.20 × 0.17 × 0.15 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 |
Absorption correction | ψ scan (ABSCOR; Higashi, 1995) |
Tmin, Tmax | 0.932, 0.948 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3417, 3182, 2169 |
Rint | 0.080 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.068, 0.167, 1.03 |
No. of reflections | 3182 |
No. of parameters | 208 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.19, −0.28 |
Absolute structure | Flack (1983), 1451 Friedel pairs |
Absolute structure parameter | −0.11 (16) |
Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1994), XCAD4 (Harms & Wocadlo, 1995), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O2—H2C···O5i | 0.82 | 1.80 | 2.620 (6) | 176.5 |
O5—H5A···O3ii | 0.85 | 2.20 | 2.890 (5) | 138.5 |
O5—H5B···O3iii | 0.85 | 2.37 | 2.827 (5) | 114.3 |
Symmetry codes: (i) x−1, y−1, z; (ii) x+1, y, z; (iii) −x+1, y+1/2, −z+2. |
Acknowledgements
This work was supported by Zhejiang Traditional Chinese Medicine University (Project 2009ZY06) and the Education Department of Zhejiang Province, China (Project 20071211).
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The steric course of the reaction between L-cysteine and aldehydes deserved much attention because this reaction had been implicated in several biochemical processes (Kallen, 1971). An analogous condensation reaction constituted the first step in the syntheses of important natural products, such as penicillin and biotin (Seki et al., 2004). Therefore, thiazolidine derivatives have become especially noteworthy in recent years (Song et al. 2009). In the present work, the structure of the title new compound is reported.
The compound consists of a (2R,4R)-3-(tert-butoxycarbonyl)-2-(3-chlorophenyl)thiazolidine-4-carboxylic acid molecule and a water molecule of crystallization (Fig. 1). The torsion angles C12—O4—C11—O3, C12—O4—C11—N1, and N1—C1—C2—S1 are 3.2 (5), 5.5 (5), and 37.1 (5)°, respectively. The S1 atom is located 0.762 (6)Å from the least-squares plane defined by C2/C1/N1/C3. In the crystal structure, the (2R,4R)-3-(tert-butoxycarbonyl)-2- (3-chlorophenyl)thiazolidine-4-carboxylic acid molecules are linked by water molecules through intermolecular O–H···O hydrogen bonds (Table 1), forming chains running along the b axis (Fig. 2).