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【结 构 式】

【分子编号】50286

【品名】1-(2-bromoethyl)cyclopropanol

【CA登记号】

【 分 子 式 】C5H9BrO

【 分 子 量 】165.02986

【元素组成】C 36.39% H 5.5% Br 48.42% O 9.69%

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:(XIX)

Assembly of the target compound: The reaction of methyl 3-bromopropionate (XVII) with ethylmagnesium bromide (XVIII) and Ti(iPrO)4 gives 1-(2-bromoethyl)cyclopropan-1-ol (XIX), which is brominated by NBS in CCl4 to yield 1,5-dibromo-3-pentanone (XX). The reaction of (XX) with ethylene glycol (XXI), HC(OEt)3 and PPTS affords the cyclic ketal (XXII), which is cyclized with the indolinone intermediate (VII) by means of NaH in DMF to provide the spiro compound (XXIII). The deprotection of (XXIII) with PPTS in acetone/water gives the spiranic diketone (XXIV), which is selectively reduced with NaBH4 in methanol to yield the spiro cyclohexanol (XXV). The condensation of (XXV) with 4-(2-chloroethyl)morpholine (XXVI) by means of NaH in hot toluene affords the corresponding ether (XXVII), which is debenzylated by means of Li/NH3 to provide intermediate (XXVIII) with a free NH group. Finally, the sulfonation of (XXVIII) with intermediate chlorosulfonyl benzamide (XVI) by means of potassium tert-butoxide gives the target sulfonyl benzamide compound.

1 Venkatesan, H.; et al.; Total synthesis of SR 121463 A, a highly potent and selective vasopressin V2 receptor antagonist. J Org Chem 2001, 66, 11, 3653.
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) 50276 1-benzyl-5-ethoxy-1,3-dihydro-2H-indol-2-one C17H17NO2 详情 详情
(XVI) 50284 4-[(tert-butylamino)carbonyl]-2-methoxybenzenesulfonyl chloride C12H16ClNO4S 详情 详情
(XVII) 50285 3-Bromopropionic acid methyl ester; Methyl 3-bromopropionate 3395-91-3 C4H7BrO2 详情 详情
(XVIII) 24239 bromo(ethyl)magnesium;ethylmagnesium bromide 925-90-6 C2H5BrMg 详情 详情
(XIX) 50286 1-(2-bromoethyl)cyclopropanol C5H9BrO 详情 详情
(XX) 50287 1,5-dibromo-3-pentanone C5H8Br2O 详情 详情
(XXI) 11295 Polyethylene glycol;1,2-Ethanediol;Monoethylene glycol; Ethylene glycol 107-21-1 C2H6O2 详情 详情
(XXII) 50288 2,2-bis(2-bromoethyl)-1,3-dioxolane C7H12Br2O2 详情 详情
(XXIII) 50289   C24H27NO4 详情 详情
(XXIV) 50290   C22H23NO3 详情 详情
(XXV) 50291   C22H25NO3 详情 详情
(XXVI) 27355 4-(2-chloroethyl)morpholine 3647-69-6 C6H12ClNO 详情 详情
(XXVII) 50292   C28H36N2O4 详情 详情
(XXVIII) 50293   C21H30N2O4 详情 详情
Extended Information