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【结 构 式】

【分子编号】33408

【品名】[(2,2-dimethylpropanoyl)oxy]methyl (4R,5S,6S)-4-methyl-7-oxo-3-[[(3R)-5-oxo-1-(triethylsilyl)pyrrolidinyl]sulfanyl]-6-[(1R)-1-[(trimethylsilyl)oxy]ethyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

【CA登记号】

【 分 子 式 】C29H50N2O7SSi2

【 分 子 量 】626.96228

【元素组成】C 55.56% H 8.04% N 4.47% O 17.86% S 5.11% Si 8.96%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(X)

A short-step synthesis of CS-834 has been described: The condensation of azetidinone (I) with pyrrolidinone (II) by means of CDI gives the thioester (III), which is desilylated with BF3/Et2O to the alcohol (IV). In order to have a more labile protecting group, alcohol (IV) is resilylated with TMS-Cl (or TES-Cl) and triethylamine affording the silyl ether (V), which is protected again at the pyrrolidine nitrogen with TES-Cl, affording the disilylated azetidinone (VI). The condensation of (VI) with the oxalyl chloride (VII) by means of triethylamine in dichloromethane gives the expected oxalylazetidinone (VIII), which is treated with diethyl ethylphosphonite in toluene yielding the ylide (IX). This compound, without isolation, is cyclized in refluxing mesitylene to afford the protected carbapenem intermediate (X), which is finally desilylated with HCl in acetonitrile. The cyclization of azetidinone (VIII) to carbapenem (X) can also be performed with triethyl phosphite instead of diethyl ethylphosphonite. The oxalyl chloride (VII) is obtained by monoesterification of oxalic acid (XI) with pivaloyloxymethyl iodide (XII) by means of triethylamine yielding monoester (XIII), which is finally converted to intermediate (VII) by treatment with oxalyl chloride in dichloromethane.

1 Oida, S.; Mori, M.; A short-step synthesis of orally active carbapenem antibiotic CS-834. Chem Pharm Bull 2000, 48, 1, 126.
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) 30029 (2R)-2-[(2S,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl]propionic acid C14H27NO4Si 详情 详情
(II) 17192 (4R)-4-sulfanyltetrahydro-2H-pyrrol-2-one 157429-42-0 C4H7NOS 详情 详情
(III) 33402 S-[(3R)-5-oxopyrrolidinyl] (2R)-2-[(2S,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl]propanethioate C18H32N2O4SSi 详情 详情
(IV) 33403 S-[(3R)-5-oxopyrrolidinyl] (2R)-2-[(2S,3S)-3-[(1R)-1-hydroxyethyl]-4-oxoazetidinyl]propanethioate C12H18N2O4S 详情 详情
(V) 33404 S-[(3R)-5-oxopyrrolidinyl] (2R)-2-((2S,3S)-4-oxo-3-[(1R)-1-[(trimethylsilyl)oxy]ethyl]azetidinyl)propanethioate C15H26N2O4SSi 详情 详情
(VI) 33405 S-[(3R)-5-oxo-1-(triethylsilyl)pyrrolidinyl] (2R)-2-((2S,3S)-4-oxo-3-[(1R)-1-[(trimethylsilyl)oxy]ethyl]azetidinyl)propanethioate C21H40N2O4SSi2 详情 详情
(VII) 17199 [(2-chloro-2-oxoacetyl)oxy]methyl pivalate C8H11ClO5 详情 详情
(VIII) 33406 [[2-((2S,3S)-2-((1R)-1-methyl-2-oxo-2-[[(3R)-5-oxo-1-(triethylsilyl)pyrrolidinyl]sulfanyl]ethyl)-4-oxo-3-[(1R)-1-[(trimethylsilyl)oxy]ethyl]azetidinyl)-2-oxoacetyl]oxy]methyl pivalate C29H50N2O9SSi2 详情 详情
(IX) 33407 [[2-[diethoxy(ethyl)phosphoranylidene]-2-((2S,3S)-2-((1R)-1-methyl-2-oxo-2-[[(3R)-5-oxo-1-(triethylsilyl)pyrrolidinyl]sulfanyl]ethyl)-4-oxo-3-[(1R)-1-[(trimethylsilyl)oxy]ethyl]azetidinyl)acetyl]oxy]methyl pivalate C35H65N2O10PSSi2 详情 详情
(X) 33408 [(2,2-dimethylpropanoyl)oxy]methyl (4R,5S,6S)-4-methyl-7-oxo-3-[[(3R)-5-oxo-1-(triethylsilyl)pyrrolidinyl]sulfanyl]-6-[(1R)-1-[(trimethylsilyl)oxy]ethyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate C29H50N2O7SSi2 详情 详情
(XI) 15713 Oxalic acid 144-62-7 C2H2O4 详情 详情
(XII) 11159 iodomethyl pivalate C6H11IO2 详情 详情
(XIII) 33409 2-[[(2,2-dimethylpropanoyl)oxy]methoxy]-2-oxoacetic acid C8H12O6 详情 详情
Extended Information