Startseite The crystal structure of benzyl 2,2,5,5-tetramethylthiazolidine-4-carboxylate, C15H21NO2S
Artikel Open Access

The crystal structure of benzyl 2,2,5,5-tetramethylthiazolidine-4-carboxylate, C15H21NO2S

  • Lingli Shao , Shuping Cai , Zhiming Li , Yutao Feng , Mengting Chen , Kaining Xu und Zhenxiang Liu ORCID logo EMAIL logo
Veröffentlicht/Copyright: 21. Februar 2025

Abstract

C15H21NO2S, monoclinic, P21/n (no. 62), a = 12.0769(6) Å, b = 6.1507(3) Å, c = 20.4335(11) Å, β = 90.710(2)°, V = 1517.71(13) Å3, Z = 4, T = 170 K, Rgt(F) = 0.0341, wR(F2) = 0.0376.

CCDC no.: 2413788

1 Source of materials

A mixture consisting of 149.2 mg (1.0 mmol) penicillamine, 165.8 mg (1.2 mmol) K2CO3 and 5 ml acetone were added to a Schlenk-tube equipped with a magnetic stir bar and stirred at room temperature (20–40 °C) for 30 min, then 118.8 μl (1.0 mmol) benzyl bromide and the phase transfer catalyst 55.6 mg (0.2 mmol) tetra-butylammonium chloride were added dropwise to the mixture and was further stirred for 16 h. The resulted solution was treated by 10 ml water and was extracted 3 times with ethyl acetate, combined the organic phases and dried with sodium sulphate anhydrous, after evaporated by rotary evaporation, the obtained mixture was subjected to chromatography using a silica gel column (an eluent was petroleum ether: ethyl acetate = 10:1 to 5:1), and 166.2 mg of the pure yellow product was obtained with a yield of 59.5 %. 1H NMR (400 MHz, chloroform-d) δ 7.37 (d, J = 5.4 Hz, 5H), 5.20 (s, 2H), 3.93 (s, 1H), 3.21 (s, 1H), 1.66 (s, 3H), 1.60 (s, 3H), 1.55 (s, 3H), 1.15 (s, 3H). 13C NMR (101 MHz, chloroform-d) δ 169.61, 135.25, 128.89, 128.79, 128.75, 72.98, 72.81, 67.22, 61.36, 33.58, 32.12, 29.09, 27.95. HRMS (ESI): m/z calcd for C15H21NO2S [M+H]+: 279.3980. Found: 280.1377.

Preparing of the crystals of benzyl 2,2,5,5-tetramethylthiazolidine-4-carboxylate was obtained through a volatile compound saturated solution method. Dissolve the compound (5.0 mg) in 15 ml mixed solvent (petroleum ether:ethyl acetate = 5:1) to obtain a pale-yellow transparent solution. Yellow needle crystals was obtained.

2 Experimental details

After absorption correction, the crystal structure was solved using the Olex2 software 2 and the programs SHELXT 3 program and refined with SHELXL 4 and the molecular graphics were drawn by using DIAMOND software. 5 All hydrogens were generated geometrically (C–H bond fixed at 0.96 Å), assigned isotropic thermal parameters, and allowed to ride on their parent carbon atoms before the final cycle of refinement.

3 Comment

The introduction of heteroatoms into heteroycles are widely distributed in nature. Moreover, most compounds associated with biological functions are heterocycles, including nucleic acids, certain vitamins, hormones, and the like. Due to their distinctive structure and properties, heterocyclic compounds exhibit a broad spectrum of applications across various sectors. 6 , 7 , 8

Thiazole derivatives are a class of nitrogen-containing heterocyclic compounds characterized by the presence of a thiazole ring, which is a five-membered ring incorporating sulfur and nitrogen atoms. These compounds hold a significant position in drug design because they can serve as the fundamental scaffolds for a variety of bioactive molecules. 9 For instance, penicillin, which was the first antibacterial drug applied clinically, the immunomodulator piduomode, the antidiabetic drug pioglitazone, and so on, all belong to thiazolidine compounds. 10

The article describes the synthesis of a new compound, benzyl 2,2,5,5-tetramethylthiazole-4-carboxylate, using penicillamine, acetone, and benzyl bromide as raw materials. The synthesis is carried out in a one-pot method under the presence of a phase transfer catalyst.

In the structure of the crystal, most bond lengths and angles within the molecule are normal (Tables 1 and 2). The C4–S1 bond length is 1.8375(11) Å, which is basically the same as the bond length. 11 , 12 , 13 , 14 The newly formed C1–S1 bond length after condensation with acetone is 1.8702(10) Å, which is the same as the bond length of the analogue and larger than those found in thiazolidine-4-carboxylic acid because the steric requirement of the methyl groups.

In the crystal structure, intermolecular hydrogen bonds are found between the O2 atom and the H6c (x, −1 + y, z) atom of adjacent molecule, H6c atom and another adjacent O2 (x, 1 + y, z) atom with d(C–H⋯O) = 2.8279(8) Å and 008736(C–H⋯O) = 128.88(7)°. These weak C–H⋯O hydrogen-bonding interactions form a one-dimensional chain and the supramolecular contact ππ stacking result a three-dimensional network structure.

Table 1:

Data collection and handling.

Crystal: Colourless needle
Size: 0.09 × 0.03 × 0.03 mm
Wavelength: GaKα radiation (1.34139 Å)
μ: 1.23 mm−1
Diffractometer, scan mode: Bruker D8 VENTURE Metaljet, PHOTON, φ and ω scans
θmax, completeness: 60.8°, 100 %
N(hkl)measured, N(hkl)unique, Rint: 49,178, 3,486, 0.040
Criterion for Iobs, N(hkl)gt: Iobs > 2σ(Iobs), 3,141
N(param)refined: 179
Programs: Bruker, 1 SHELX 2 , 3 , Diamond 4 , OLEX2 5
Table 2:

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

x y z Uiso*/Ueq
S1 0.20321 (2) 0.97036 (6) 0.63686 (2) 0.03833 (11)
O1 0.46416 (7) 0.75826 (14) 0.47468 (4) 0.0375 (2)
O2 0.31712 (6) 0.53949 (13) 0.46129 (4) 0.02911 (18)
N1 0.40714 (7) 0.86284 (15) 0.59863 (4) 0.02594 (19)
C1 0.35434 (8) 0.94915 (17) 0.65692 (5) 0.0250 (2)
C2 0.36888 (11) 0.7940 (2) 0.71430 (6) 0.0386 (3)
H2A 0.327517 0.848599 0.751842 0.058*
H2B 0.447615 0.783384 0.726060 0.058*
H2C 0.340896 0.649933 0.701988 0.058*
C3 0.40140 (10) 1.17068 (18) 0.67408 (6) 0.0325 (2)
H3A 0.391008 1.269398 0.636865 0.049*
H3B 0.480601 1.156876 0.684245 0.049*
H3C 0.363003 1.228990 0.712238 0.049*
C4 0.21509 (9) 0.84531 (19) 0.55558 (5) 0.0301 (2)
C5 0.12003 (10) 0.6851 (3) 0.54518 (6) 0.0451 (3)
H5A 0.125840 0.567964 0.577559 0.068*
H5B 0.123914 0.623506 0.501040 0.068*
H5C 0.049286 0.760903 0.550275 0.068*
C6 0.21486 (12) 1.0213 (2) 0.50300 (7) 0.0454 (3)
H6A 0.147641 1.109462 0.506658 0.068*
H6B 0.216677 0.953160 0.459670 0.068*
H6C 0.280124 1.114256 0.508883 0.068*
H1 0.4340 (14) 0.969 (3) 0.5750 (8) 0.055*
C7 0.33009 (8) 0.72958 (17) 0.56116 (5) 0.0253 (2)
H7 0.319860 0.589087 0.584954 0.030*
C8 0.37977 (8) 0.68032 (17) 0.49491 (5) 0.0266 (2)
C9 0.35527 (9) 0.49053 (19) 0.39538 (5) 0.0301 (2)
H9A 0.427235 0.413639 0.397517 0.036*
H9B 0.365027 0.626671 0.370259 0.036*
C10 0.26958 (9) 0.34979 (18) 0.36286 (5) 0.0268 (2)
C11 0.16061 (9) 0.4196 (2) 0.35581 (6) 0.0343 (3)
H11 0.139298 0.557537 0.372346 0.041*
C12 0.08315 (10) 0.2884 (3) 0.32474 (6) 0.0434 (3)
H12 0.008545 0.335805 0.320451 0.052*
C13 0.11402 (12) 0.0883 (3) 0.29990 (6) 0.0457 (3)
H13 0.060574 −0.001238 0.278598 0.055*
C14 0.22234 (12) 0.0186 (2) 0.30602 (6) 0.0399 (3)
H14 0.243760 −0.117837 0.288469 0.048*
C15 0.29986 (10) 0.14900 (19) 0.33796 (5) 0.0315 (2)
H15 0.374149 0.100207 0.342778 0.038*

Corresponding author: Zhenxiang Liu, College of Pharmaceutical Engineering, Jinhua University of Vocational Technology, Jinhua, 321016, People’s Republic of China, E-mail:

Acknowledgments

We are grateful to the Jinhua Science and Technology Bureau (No. 2020-1-003a and 2023-4-048) and Domestic University–Industry Cooperation Project for Higher Education Visiting Engineers of Zhejiang Province in 2024 (Grant No. FG2024018) for financial support.

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Received: 2025-01-06
Accepted: 2025-01-27
Published Online: 2025-02-21
Published in Print: 2025-06-26

© 2025 the author(s), published by De Gruyter, Berlin/Boston

This work is licensed under the Creative Commons Attribution 4.0 International License.

Artikel in diesem Heft

  1. Frontmatter
  2. New Crystal Structures
  3. Crystal structure of 5,5′-bis(2,4,6-trinitrophenyl)-2,2′-bi(1,3,4-oxadiazole), C16H4N10O14
  4. Crystal structure of catena-poly[(μ3-4,4′-oxydibenzoato- κ5 O,O: O,O:O)-bis(2,4,6-tri(3-pyridine)-1,3,5-triazine-κ1 N)cadmium(II)], C50H32CdN12O5
  5. The crystal structure of 1,4-diazepane-1,4-diium potassium trinitrate, C5H14KN5O9
  6. The crystal structure of benzyl 2,2,5,5-tetramethylthiazolidine-4-carboxylate, C15H21NO2S
  7. Crystal structure of 2-hydroxyethyl-triphenylphosphonium tetracyanidoborate, C24H20BN4OP
  8. The crystal structure of 1-methyl-3-(N-methylnitrous amide–N-methylene) imidazolidine-2,4,5-trione
  9. Crystal structure of N-((3-cyano-1-(2,6-dichloro-4-(trifluoromethyl)phenyl)-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-5-yl)carbamoyl)-2,6-difluorobenzamide, C20H7Cl2F8N5O3S
  10. Crystal structure of 5-(2,2-difluoropropyl)-5-methylbenzo[4,5]imidazo[2,1-a] isoquinolin-6(5H)-one, C20H18F2N2O
  11. The crystal structure of N′,N″-[1,2-bis(4-chlorophenyl)ethane-1,2-diylidene]bis(furan-2- carbohydrazide), C24H16Cl2N4O4
  12. Crystal structure of [(4-bromobenzyl)triphenylphosphonium] tetrabromoantimony(III), [C25H21BrP]+[SbBr4]
  13. Crystal structure of [(4-bromobenzyl)triphenylphosphonium] tetrabromidoindium(III), [C25H21BrP]+[InBr4]
  14. The crystal structure of 4-carboxy-2-oxobutan-1-aminium chloride, C5H10ClNO3
  15. Crystal structure of (4-(4-chlorophenyl)-1H-pyrrole-3-carbonyl)ferrocene, C21H16ClFeNO
  16. The crystal structure of dichlorido(η6-p-cymene)(triphenylarsine)ruthenium(II), C28H29AsCl2Ru
  17. Crystal structure of (Z)-2-hydroxy-N′-(1-(o-tolyl)ethylidene)benzohydrazide, C16H16N2O2
  18. The crystal structure of 10-(1-bromoethyl)-14-(bromomethyl)dibenzo[a, c]acridine, C24H17NBr2
  19. Synthesis and crystal structure of 6-methoxy-7-[(4-methoxyphenyl)methoxy]-2H-1-benzopyran-2-one, C18H16O5
  20. Synthesis and crystal structure of ethyl 4-((4-trifluoromethylbenzyl)amino)benzo, C17H16F3NO2
  21. The crystal structure of (Z)-2-(tert-butyl)-6-(7-(tert-butyl)-5-methylbenzo[d][1,3]oxathiol-2-ylidene)-4-methylcyclohexa-2,4-dien-1-one, C23H28O2S
  22. The crystal structure of (R)-2-aminobutanamide hydrochloride, C4H11ClN2O
  23. Crystal structure of bromido[hydridotris(3-tert-butyl-5-isopropylpyrazolyl)borato-κ3 N,N′,N″]copper(II), C30H52BBrCuN6
  24. Crystal structure of chlorido{hydridotris[3-mesityl-5-methyl-1H-pyrazol-1-yl-κN3]borato}-copper(II) dichloromethane monosolvate
  25. Crystal structure of 4-[3,5-bis(propan-2-yl)-1H-pyrazol-4-yl]pyridine, C14H19N3
  26. Crystal structure of ((4-(4-bromophenyl)-1H-pyrrol-3-yl)methyl)ferrocene, C21H16BrFeNO
  27. Crystal structure of [(4-chlorobenzyl)triphenylphosphonium] dichloridocopper(I), {[C25H21ClP]+[CuCl2]}n
  28. The crystal structure of {Cu(2,9-diisopropyl-4,7-diphenyl-1,10-phenanthroline)[4,5-bis(diphenylphosphino)-9,9-dimethylxanthene]}+ PF6·1.5(EtOAC)
  29. Crystal structure of 3,5-bis(t-butyl)-1H-pyrazol-4-amine, C11H21N3
  30. Crystal structure of [(2,4-dichlorobenzyl)triphenylphosphonium] trichloridocopper(II), [C25H20Cl2P]+[CuCl3]
  31. The crystal structure of dipotassium sulfide, K2S
  32. Crystal structure of (4-(4-methoxyphenyl)-1H-pyrrole-3-carbonyl)ferrocene, C22H19FeNO2
  33. Crystal structure of (E)-6-(4-methylpiperazin-1-yl)-2-(4-(trifluoromethyl)benzylidene)-3, 4-dihydronaphthalen-1(2H)-one, C23H23F3N2O
  34. Crystal structure of (E)-6-morpholino-2-(4-(trifluoromethyl)benzylidene)-3,4-dihydronaphthalen-1(2H)-one, C22H20F3NO2
  35. Crystal structure of Ce9Ir37Ge25
  36. The crystal structure of ethyl 6-(2-nitrophenyl)imidazo[2,1-b]thiazole-3-carboxylate, C14H11N3O4S
  37. Crystal structure of (4-(4-isopropylphenyl)-1H-pyrrol-3-yl)(ferrocenyl)methanone, C24H23FeNO
  38. Crystal structure of bis(methylammonium) tetrathiotungstate(VI), (CH3NH3)2[WS4]
  39. Crystal structure of 6,11-dihydro-12H-benzo[e]indeno[1,2-b]oxepin-12-one, C17H12O2
  40. Crystal structure of 3-[(4-phenylpiperidin-1-yl)methyl]-5-(thiophen-2-yl)-2,3-dihydro-1,3,4- oxadiazole-2-thione, C18H19N3OS2
  41. Crystal structure of N-isopropyl-1,8-naphthalimide C15H13NO2
  42. TiNiSi-type EuPdBi
  43. Crystal structure of 1-(p-tolylphenyl)-4-(2-thienoyl)-3-methyl-1H-pyrazol-5-ol, C16H14N2O2S
  44. The crystal structure of 3-(3-carboxypropyl)-2-nitro-1H-pyrrole 1-oxide, C7H9N3O5
  45. The crystal structure of tetraaqua-bis(2-(2-methyl-5-nitro-1H-imidazol-1-yl)acetato-k2O:N)-tetrakis(2-(2-methyl-5-nitro-1H-imidazol-1-yl)acetato-k1N)trizinc(II) hexahydrate C36H52N18O32Zn3
  46. The crystal structure of 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 4-hydroxy-3,5-dimethoxybenzoate monohydrate, C25H30FN3O9
  47. Crystal structure of bis(DL-1-carboxy-2-(1H-indol-3-yl)ethan-1-aminium) oxalate — acetic acid (1/2)
  48. Crystal structure of methyl (E)-4-((4-methylphenyl)sulfonamido)but-2-enoate, C12H15NO4S
  49. The crystal structure of actarit, C10H11NO3
  50. The crystal structure of bicyclol, C19H18O9
  51. The crystal structure of topiroxostat, C13H8N6
  52. Crystal structure of 2,2-dichloro-N-methyl-N-(4-p-tolylthiazol-2-yl)acetamide, C13H12Cl2N2OS
  53. Crystal structure of 4-(trifluoromethyl)-7-coumarinyl trifluoromethanesulfonate C11H4F6O5S
  54. Crystal structure of (1,4,7,10,13,16-hexaoxacyclooctadecane-κ6O6)-((Z)-N,N′-bis(2-(dimethylamino)phenyl)carbamimidato-κ1N)potassium(I)
  55. Crystal structure of (Z)-2-(5-((4-(dimethylamino)naphthalen-1-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)acetic acid, C18H16N2O3S2
  56. Crystal structure of (4-fluorobenzyl)triphenylphosphonium bromide, C25H21BrFP
  57. The crystal structure of dichlorido-[6-(pyridin-2-yl)phenanthridine-κ2N, N′]zinc(II)-chloroform (1/1), C19H13N2ZnCl5
  58. Crystal structure of (E)-(3-(2,4-dichlorophenyl)acryloyl)ferrocene, C19H14Cl2FeO
  59. The crystal structure of (E)-7-chloro-1-cyclopropyl-6-fluoro-3-((2-hydroxybenzylidene)amino)quinolin-4(1H)-one, C19H14ClFN2O2
  60. Crystal structure of 2-bromo-11-(((fluoromethyl)sulfonyl)methyl)-6-methyl-6,11-dihydrodibenzo[c,f][1,2]thiazepine 5,5-dioxide, C16H13BrFNO4S2
  61. Crystal structure of 2-chloro-11-(((fluoromethyl)sulfonyl)methyl)-6-methyl-6,11-dihydrodibenzo[c,f][1,2]thiazepine 5,5-dioxide, C16H13ClFNO4S2
  62. Crystal structure of 5-(2,2-difluoropropyl)-5-methyl-6-oxo-5,6-dihydrobenzo[4,5]imidazo[2,1-a]isoquinoline-3-carbonitrile, C20H15F2N3O
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