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【结 构 式】 
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【分子编号】62436 【品名】(2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one 【CA登记号】 |
【 分 子 式 】C16H15NO3S 【 分 子 量 】301.36604 【元素组成】C 63.77% H 5.02% N 4.65% O 15.93% S 10.64% |
合成路线1
该中间体在本合成路线中的序号：(VIII)Electrophilic bromination of ethyl p-methoxycinnamate (I) by means of N-bromosuccinimide in moist acetone gave rise to the racemic erythro bromohydrin (II), which was esterified with butyric anhydride to produce the racemic bromoester (III). Kinetic resolution of (III) employing Candida cylindracea lipase caused the enantioselective hydrolysis of the (S,S)-enantiomer, yielding the chiral bromohydrin (V). Cyclization of (V) in the presence of NaOMe furnished epoxide (VI). The target thiazepinone (VIII) was then obtained by condensation between the glycidic ester (VI) and 2-aminobenzenethiol (VII)
| 【1】 McCague, R.; Wang, S.; Taylor, S.J.C. (Celltech Group plc); Chiral arylpropionates and their use. WO 9413828 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (A) | 25047 | butyric anhydride | 106-31-0 | C8H14O3 | 详情 | 详情 |
| (I) | 62431 | ethyl (E)-3-(4-methoxyphenyl)-2-propenoate | C12H14O3 | 详情 | 详情 | |
| (II) | 62432 | ethyl (2S,3S)-2-bromo-3-hydroxy-3-(4-methoxyphenyl)propanoate | C12H15BrO4 | 详情 | 详情 | |
| (III) | 62433 | (1S,2S)-2-bromo-3-ethoxy-1-(4-methoxyphenyl)-3-oxopropyl butyrate | C16H21BrO5 | 详情 | 详情 | |
| (IV) | 62434 | (1R,2R)-2-bromo-3-ethoxy-1-(4-methoxyphenyl)-3-oxopropyl butyrate | C16H21BrO5 | 详情 | 详情 | |
| (V) | 62432 | ethyl (2S,3S)-2-bromo-3-hydroxy-3-(4-methoxyphenyl)propanoate | C12H15BrO4 | 详情 | 详情 | |
| (VI) | 62435 | ethyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C12H14O4 | 详情 | 详情 | |
| (VII) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 |
合成路线2
该中间体在本合成路线中的序号：(VIII)In a further process, the racemic trans glycidic ester (XII), prepared by Darzen's condensation between anisaldehyde (X) and methyl chloroacetate (XI), was resolved by enantioselective enzymatic hydrolysis, using several different enzymes and reaction conditions to produce the undesired (2S,3R) acid (XIII), while leaving intact the required (2R,3S)-glycidic ester (XIV) (4-7). Opening of the chiral epoxide (XIV) with 2-aminobenzenethiol (VII) proceeded with retention of the configuration, producing methyl (2S,3S)-2-hydroxy-3-(2-aminophenylsulfanyl)-3-(4-methoxyphenyl)propionate (XV) (8). Alternatively, the (S,S)-amino ester (XV) was obtained by resolution with tartaric acid of the racemic three-adduct resulting from epoxide (XII) and 2-aminobenzenethiol (VII) (9). Cyclization of amino ester (XV) in refluxing xylene in the presence of p-toluenesulfonic acid afforded the target lactam (VIII) (9). The cyclization of (XV) to lactam (VIII) was also accomplished by means of trichloroacetic acid or under basic conditions
| 【1】 Bhushan, L.B.; Jayachandran, B.E.; Bhushan, L.V.; Thottappillil, R. (Council of Scientific and Industrial Research); Process for preparing diltiazem. US 5869697 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (VII) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (X) | 27251 | 4-methoxybenzaldehyde; Anisicaldehyde; p-anisaldehyde | 123-11-5 | C8H8O2 | 详情 | 详情 |
| (XI) | 10257 | methyl 2-chloroacetate; methyl chloroacetate | 96-34-4 | C3H5ClO2 | 详情 | 详情 |
| (XII) | 11905 | methyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C11H12O4 | 详情 | 详情 | |
| (XIII) | 62438 | (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylic acid | C10H10O4 | 详情 | 详情 | |
| (XIV) | 62435 | ethyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C12H14O4 | 详情 | 详情 | |
| (XV) | 62439 | methyl (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoate | C17H19NO4S | 详情 | 详情 |
合成路线3
该中间体在本合成路线中的序号：(VIII)Addition of phenylmagnesium bromide to cyclohexene oxide (XXI) in the presence of CuCl gave trans-2-phenylcyclohexanol (XXII), which was further esterified with chloroacetyl chloride to afford 2-phenylcyclohexyl chloroacetate (XXIII). Enantioselective hydrolysis of the racemic ester (XXIII) by means of Pseudomonas fluorescens lipase provided pure (1R,2S)-2-phenylcyclohexanol (XXIV), which was again esterified with chloroacetyl chloride, yielding the chiral ester (XXVI). Darzen's condensation of chloro ester (XXVI) with anisaldehyde (X) led to the chiral glycidic ester (XXVII). Epoxide ring opening in (XXVII) with 2-aminothiophenol (VII) furnished amino ester (XXVIII). Intermediate thiazepinone (VIII) was then obtained by cyclization of (XXVIII) using p-toluenesulfonic acid in refluxing xylene. Alternatively, amino ester (XXVIII) was first hydrolyzed to amino acid (XXIX), which was subsequently cyclized with p-toluenesulfonic acid as above (11). The final cyclization of amino acid (XXIX) to the intermediate thiazepinone (VIII) has also been carried out in the presence of trichloroacetic acid
| 【1】 Plaum, M.J.M.; Boesten, W.H.J.; Process for the preparation of a benzothiazepine. EP 0796853; JP 1998007667; US 5859241 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (+/-)-(XXII) | 51208 | (1R,2S)-2-phenylcyclohexanol | C12H16O | 详情 | 详情 | |
| (+/-)-(XXIII) | 62445 | (1S,2R)-2-phenylcyclohexyl 2-chloroacetate | C14H17ClO2 | 详情 | 详情 | |
| (VII) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (X) | 27251 | 4-methoxybenzaldehyde; Anisicaldehyde; p-anisaldehyde | 123-11-5 | C8H8O2 | 详情 | 详情 |
| (XXI) | 17986 | 7-oxabicyclo[4.1.0]heptane; cyclohexene oxide | 286-20-4 | C6H10O | 详情 | 详情 |
| (XXIV) | 10492 | (1S,2R)-(+)-trans-2-Phenyl-1-cyclohexanol; (1S,2R)-2-Phenylcyclohexanol | 2362-61-0 | C12H16O | 详情 | 详情 |
| (XXV) | 62445 | (1S,2R)-2-phenylcyclohexyl 2-chloroacetate | C14H17ClO2 | 详情 | 详情 | |
| (XXVI) | 62445 | (1S,2R)-2-phenylcyclohexyl 2-chloroacetate | C14H17ClO2 | 详情 | 详情 | |
| (XXVII) | 62446 | (1R,2S)-2-phenylcyclohexyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C22H24O4 | 详情 | 详情 | |
| (XXVIII) | 62447 | (1R,2S)-2-phenylcyclohexyl (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoate | C28H31NO4S | 详情 | 详情 | |
| (XXIX) | 62448 | (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoic acid | C16H17NO4S | 详情 | 详情 |
合成路线4
该中间体在本合成路线中的序号：(VIII)The racemic thiazepinone (XXXIII) has been converted to the pure enantiomer (VIII) through a different strategy. Oxidation of hydroxy lactam (XXXIII) by means of DMSO and Ac2O produced the enol ester (XXXV). Basic hydrolysis of (XXXI) gave rise to the keto lactam (XXXV). This was then subjected to asymmetric reduction utilizing a reducing reagent generated in situ from NaBH4 and (S)-tert-leucine to afford the intermediate thiazepinone (VIII)
| 【1】 Yamada, S.; Mori, Y.; Morimatsu, K.; Ishizu, Y.; Ozaki, Y.; Yoshioka, R.; Nakatani, T.; Seko, H.; Asymmetric reduction of a 1,5-benzothiazepine derivative with sodium borohydride-(S)-alpha-amino acids: An efficient synthesis of a key intermediate of diltiazem. J Org Chem 1996, 61, 24, 8586. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 28445 | (2S)-2-amino-3,3-dimethylbutyric acid | C6H13NO2 | 详情 | 详情 | ||
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (XXXIII) | 63413 | (6-bromo-3-pyridinyl)(1,4-dioxa-8-azaspiro[4.5]dec-8-yl)methanone | C13H15BrN2O3 | 详情 | 详情 | |
| (XXXIV) | 62452 | 2-(4-methoxyphenyl)-4-oxo-4,5-dihydro-1,5-benzothiazepin-3-yl acetate | C18H15NO4S | 详情 | 详情 | |
| (XXXV) | 62453 | 2-(4-methoxyphenyl)-1,5-benzothiazepine-3,4(2H,5H)-dione | C16H13NO3S | 详情 | 详情 |
合成路线5
该中间体在本合成路线中的序号：(VIII)The key cis glycidate ester (XLIII) was prepared by (salen)Mn(III)-catalyzed asymmetric epoxidation of the cis cinnamate (XXXIX). Epoxide opening in (XLIII) with 2-nitrothiophenol (XLIV), with inversion of the configuration, led to the nitro ester adduct (XLV). The nitro group of (XLV) was then reduced to the aniline derivative (XLVI) by means of FeSO4. Subsequent isopropyl ester group saponification in (XLVI) furnished amino acid (XXIX). This was then cyclized to the target thiazepinone (VIII) in refluxing xylene
| 【1】 Jacobsen, E.N.; Deng, L.; Furukawa, Y.; Martinez, L.E.; Enantioselective catalytic epoxidation of cinnamate esters. Tetrahedron 1994, 50, 15, 4323. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| 62502 | 4-Picoline N-oxide; 4-Methyl-1-pyridiniumolate | 1003-67-4 | C6H7NO | 详情 | 详情 | |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (XXIX) | 62448 | (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoic acid | C16H17NO4S | 详情 | 详情 | |
| (XXXIX) | 62458 | isopropyl (Z)-3-(4-methoxyphenyl)-2-propenoate | C13H16O3 | 详情 | 详情 | |
| (XLIII) | 62459 | isopropyl (2R,3R)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C13H16O4 | 详情 | 详情 | |
| (XLIV) | 62460 | 2-nitrobenzenethiol; 2-nitrophenylhydrosulfide | C6H5NO2S | 详情 | 详情 | |
| (XLV) | 62461 | isopropyl (2S,3S)-2-hydroxy-3-(4-methoxyphenyl)-3-[(2-nitrophenyl)sulfanyl]propanoate | C19H21NO6S | 详情 | 详情 | |
| (XLVI) | 62462 | isopropyl (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoate | C19H23NO4S | 详情 | 详情 |
合成路线6
该中间体在本合成路线中的序号：(VIII)In a variation of the preceding methods, the chiral glycidic amide (XLVII) was used as the synthetic precursor. Amide (XLVII) was either prepared by treatment of the chiral glycidic ester (VI) with ammonia, or by enzymatic resolution of (XII), followed by amidation. Iron-catalyzed addition of 2-aminothiophenol (VII) to the glycidamide (XLVII) in refluxing chlorobenzene yielded the desired threo adduct (XLVIII) as the major isomer. Cyclization of amino amide (XLVIII) under acidic conditions furnished thiazepinone (VIII)
| 【1】 Yamada, S.; Tsujioka, I.; Shibatini, T.; Yoshioka, R.; Efficient alterative synthetic route to diltiazem via (2R,3S)-3-(4-methoxyphenyl)glycidamide. Chem Pharm Bull 1999, 47, 2, 146. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (VI) | 62435 | ethyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C12H14O4 | 详情 | 详情 | |
| (VII) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (XII) | 11905 | methyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C11H12O4 | 详情 | 详情 | |
| (XLVII) | 62463 | (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxamide | C10H11NO3 | 详情 | 详情 | |
| (XLVIII) | 62464 | (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanamide | C16H18N2O3S | 详情 | 详情 |
合成路线7
该中间体在本合成路线中的序号：(VIII)Aldol condensation of anisaldehyde (X) with the lithium enolate of the N-acyl oxazolidinone (XLIX) gave adduct (L). Dehydration of alcohol (L) was accomplished by formation of the corresponding mesylate (LI), which underwent elimination in the presence of DBU, to produce a 4:1 mixture of Z and E olefins. After chromatographic isolation of the major Z isomer (LII), diastereoselective Michael addition using a 1:2 mixture of 2-aminothiophenol (VII) and the corresponding lithium thiophenoxide furnished (LIII) as the major diastereoisomer. Intramolecular cyclization of the amino imide (LIII) to the benzothiazepinone (LIV) was accomplished in the presence of trimethylaluminium in refluxing CH2Cl2. The methoxymethyl group of (LIV) was then removed by treatment with TiCl4, leading to the key precursor the thiazepinone (VIII)
| 【1】 Miyata, O.; Shinada, T.; Ninomiya, I.; Naito, T.; Asymmetric construction of two contiguous stereocenters by diastereoface differentiating addition reaction of thiols to chiral imides: Formal synthesis of (+)-diltiazem. Tetrahedron 1997, 53, 7, 2421. |
| 【2】 Miyata, O.; Shinada, T.; Ninomiya, I.; Naito, T.; Asymmetric induction at two contiguous stereogenic centers by diastereoface differentiating nucleophilic addition reaction. Tetrahedron Lett 1991, 32, 29, 3519. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (VII) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (VIII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (X) | 27251 | 4-methoxybenzaldehyde; Anisicaldehyde; p-anisaldehyde | 123-11-5 | C8H8O2 | 详情 | 详情 |
| (XLIX) | 62465 | (4S)-4-isopropyl-3-[2-(methoxymethoxy)acetyl]-1,3-oxazolidin-2-one | C10H17NO5 | 详情 | 详情 | |
| (L) | 62466 | (4S)-3-[3-hydroxy-2-(methoxymethoxy)-3-(4-methoxyphenyl)propanoyl]-4-isopropyl-1,3-oxazolidin-2-one | C18H25NO7 | 详情 | 详情 | |
| (LI) | 62467 | 3-[(4S)-4-isopropyl-2-oxo-1,3-oxazolidin-3-yl]-2-(methoxymethoxy)-1-(4-methoxyphenyl)-3-oxopropyl methanesulfonate | C19H27NO9S | 详情 | 详情 | |
| (LII) | 62468 | (4S)-4-isopropyl-3-[(Z)-2-(methoxymethoxy)-3-(4-methoxyphenyl)-2-propenoyl]-1,3-oxazolidin-2-one | C18H23NO6 | 详情 | 详情 | |
| (LIII) | 62469 | (4S)-3-[(2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-(methoxymethoxy)-3-(4-methoxyphenyl)propanoyl]-4-isopropyl-1,3-oxazolidin-2-one | C24H30N2O6S | 详情 | 详情 | |
| (LIV) | 62470 | (2S,3S)-3-(methoxymethoxy)-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C18H19NO4S | 详情 | 详情 |
合成路线8
该中间体在本合成路线中的序号：(I)Alkylation of the lactam N of thiazepinone (I) with 2-(dimethylamino)ethyl chloride (II) in the presence of K2CO3 or under phase-transfer conditions gave thiazeinone (III). Subsequent esterification of (III) with acetic anhydride furnished the title compound. Alternatively, diltiazem has been prepared by acetylation of thiazeinone (I) with Ac2O to yield the lactam acetate ester (IV), which is then alkylated with chloride (II) under phase-transfer conditions
| 【1】 Coffen, D.L.; Madan, P.B.; Schwartz, A. (F. Hoffmann-La Roche AG); Process for the preparation of optically pure aminophenylthio- and aminonaphthalenylthio-propanoic acids. EP 0343474 . |
| 【2】 Honma, T.; Igarashi, K. (Shionogi & Co. Ltd.); Process for production of diltiazem hydrochloride. US 4552695 . |
| 【3】 Murthy, K.; Weeratunga, G.; Burchat, A. (ACIC (Canada) Inc.); Method for the manufacture of benzothiazepine derivs.. WO 9638429 . |
| 【4】 Piselli, F.L.; Boschi, P.; Navoni, C.; A process for the preparation of diltiazem. EP 0594101 . |
| 【5】 Bhushan, L.B.; Jayachandran, B.E.; Bhushan, L.V.; Thottappillil, R. (Council of Scientific and Industrial Research); Process for preparing diltiazem. US 5869697 . |
| 【6】 Hytonen, M. (Orion Corporation); Process for the manufacture of diltiazem. EP 0728751; JP 1996253464; US 5644054 . |
| 【7】 Hulshof, L.A.; Kuilman, T.; Process for preparing 1,5-benzothiazepin derivs.. EP 0450705 . |
| 【8】 Manghisi, E.; Cascio, G. (Lusofarmaco); Process for the optical resolution of the dl-alpha-hydroxy-3-(4-methoxyphenyl)-3-(2-aminophenylthio)propionic acid. US 4533748 . |
| 【9】 Simonovitch, H.; Hoffmann, T.; Sassoon, S. (Abic, Ltd.); A process for the preparation of benzothiazepin derivs.. EP 0158303 . |
| 【10】 Hytonen, M. (Orion Corporation); Method for the preparation of pharmaceutically active benzothiazepine derivs.. EP 0702009 . |
| 【11】 Manghisi, E.; Perego, B.; A process for the preparation of diltiazem. WO 9210485 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (I) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (II) | 11907 | Dimethylaminoethyl chloride; 2-Dimethylaminoethyl chloride; 2-Chloro-N,N-dimethyl-1-ethanamine; N-(2-Chloroethyl)-N,N-dimethylamine | 107-99-3 | C4H10ClN | 详情 | 详情 |
| (III) | 62488 | (2S,3S)-5-[2-(dimethylamino)ethyl]-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C20H24N2O3S | 详情 | 详情 | |
| (IV) | 62452 | 2-(4-methoxyphenyl)-4-oxo-4,5-dihydro-1,5-benzothiazepin-3-yl acetate | C18H15NO4S | 详情 | 详情 |
合成路线9
该中间体在本合成路线中的序号：(I)Similarly, thiazepinone (I) was transesterified with isopropenyl acetate (V) to afford acetate ester (IV). Subsequent alkylation of the lactam N of (IV) with 2-(dimethylamino)ethyl mesylate (VI) in the presence of K2CO3 furnished diltiazem. Similarly, thiazepinone (I) was transesterified with isopropenyl acetate (V) to afford acetate ester (IV). Subsequent alkylation of the lactam N of (IV) with 2-(dimethylamino)ethyl mesylate (VI) in the presence of K2CO3 furnished diltiazem.
| 【1】 Harsanyi, K.; Gizur, T.; Demeter, A.; Aracs, Z.; Felmeri, J.; Berki, K.; Trischeler, F.; Vincze, Z. (Gedeon Richter Ltd.); Process for the preparation of benzothiazepin-4(5H)-one derivs.. ES 2001146; JP 1987108872 . |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (I) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (III) | 62488 | (2S,3S)-5-[2-(dimethylamino)ethyl]-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C20H24N2O3S | 详情 | 详情 | |
| (IV) | 62490 | (2S,3S)-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate | C18H17NO4S | 详情 | 详情 | |
| (V) | 21178 | isopropenyl acetate | 108-22-5 | C5H8O2 | 详情 | 详情 |
| (VI) | 62491 | ethyl 3-chloro-3-(3-pyridinyl)propyl(methyl)carbamate | C12H17ClN2O2 | 详情 | 详情 |
合成路线10
该中间体在本合成路线中的序号：(XII)Several related procedures utilize racemic intermediates that are resolved in more advanced synthetic steps. The racemic trans-glycidic ester (IX) was prepared by Darzen's condensation between anisaldehyde (VII) and methyl chloroacetate (VIII). Opening of the epoxide group of (IX) with 2-aminothiophenol (X) in hot chlorobenzene in the presence of FeCl3 gave rise to the racemic threo adduct (XI) which, without isolation, was cyclized to the cis-lactam (XII) by addition of methanesulfonic acid and then heating to reflux. Alkylation of the lactam N of (XII) with 2-(dimethylamino)ethyl chloride (II) led to the racemic precursor (XIII). Resolution of (XIII) to provide the (S,S)-isomer (VII) was then accomplished by preferential crystallization of supersaturated solutions of several sulfonate salts of (XIII) upon seeding with the desired enantiomer. Racemic diltiazem (XIV), obtained by acetylation of (XIII), has been resolved via formation of the corresponding diastereoisomeric salts with (S)-naproxen
| 【1】 Gizur, T.; Harsanyi, K.; Fogassy, E.; Studies of the resolution of racemates in the synthesis of diltiazem. J Prakt Chem Chem-Ztg 1994, 336, 7, 628. |
| 【2】 Yamada, S.; Yoshioka, R.; Shibatani, T.; Optical resolution of a 1,5-benzothiazepine derivative,a synthetic intermediate of diltiazem, by preferential crystallization and diastereomeric salt formation. Chem Pharm Bull 1997, 45, 12, 1922. |
| 中间体序号 | 中间体编号 | 品名 | CAS号 | 分子式 | 供应商 | 用于合成 |
|---|---|---|---|---|---|---|
| (II) | 11907 | Dimethylaminoethyl chloride; 2-Dimethylaminoethyl chloride; 2-Chloro-N,N-dimethyl-1-ethanamine; N-(2-Chloroethyl)-N,N-dimethylamine | 107-99-3 | C4H10ClN | 详情 | 详情 |
| (VII) | 27251 | 4-methoxybenzaldehyde; Anisicaldehyde; p-anisaldehyde | 123-11-5 | C8H8O2 | 详情 | 详情 |
| (VII) | 62488 | (2S,3S)-5-[2-(dimethylamino)ethyl]-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C20H24N2O3S | 详情 | 详情 | |
| (VIII) | 10257 | methyl 2-chloroacetate; methyl chloroacetate | 96-34-4 | C3H5ClO2 | 详情 | 详情 |
| (IX) | 11905 | methyl (2R,3S)-3-(4-methoxyphenyl)-2-oxiranecarboxylate | C11H12O4 | 详情 | 详情 | |
| (X) | 25182 | 2-aminobenzenethiol | 137-07-5 | C6H7NS | 详情 | 详情 |
| (XI) | 62439 | methyl (2S,3S)-3-[(2-aminophenyl)sulfanyl]-2-hydroxy-3-(4-methoxyphenyl)propanoate | C17H19NO4S | 详情 | 详情 | |
| (XII) | 62436 | (2S,3S)-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C16H15NO3S | 详情 | 详情 | |
| (XIII) | 62487 | 5-[2-(dimethylamino)ethyl]-3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one | C20H24N2O3S | 详情 | 详情 | |
| (XIV) | 62489 | 5-[2-(dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate | C22H26N2O4S | 详情 | 详情 |