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【结 构 式】

【分子编号】65303

【品名】 

【CA登记号】 

【 分 子 式 】C14H16O3

【 分 子 量 】232.27924

【元素组成】C 72.39% H 6.94% O 20.66%

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:(XLVII)

Several alternative routes to the intermediate amine (V) are shown in Scheme 4. The asymmetric reduction of ethyl 2-oxocyclohexanecarboxylate (XLII) gives the (1R,2S)-hydroxy ester (XLIII), which is converted to amide (XLIV) by treatment with aqueous ammonia and ammonium chloride. After activation of the hydroxyl group of (XLIV) as the corresponding mesylate (XLV), displacement with the potassium alkoxide of 3,4-dimethoxyphenethyl alcohol (XI) affords the trans-amide ether (XLVI). The target amine (V) is then obtained by Hofmann rearrangement of carboxamide (XLVI) employing NaOCl and NaOH. A different resolution method involves transesterification of ethyl 2-oxocyclohexanecarboxylate (XLII) with benzyl alcohol, followed by enzymatic reduction of the resulting benzyl keto ester (XLVII) with carbonyl reductase to provide the (1R,2R)-hydroxy ester (XLVIII). Coupling of (XLVIII) with imidate (X) furnishes the benzyl phenethoxycyclohexanecarboxylate (XLIX), which is subjected to benzyl group hydrogenolysis to provide acid (L). This compound can also be obtained by condensation of ethyl 2(R)-hydroxy-1(R)-cyclohexanecarboxylate (LI) with 3,4-dimethoxyphenethyl trichloroacetimidate (X), followed by alkaline hydrolysis of the obtained ethyl 2-phenethoxycyclohexanecarboxylate (LII). Optionally, the ethyl ester (LII) can be converted to amide (XLVI) by reaction with methanolic ammonia, or to hydrazide (LIII) by treatment with hydrazine hydrate in EtOH. Conversion of acid (L) to the target amine (V) can then be accomplished by Curtius rearrangement employing diphenylphosphoryl azide. Analogously, diazotization of hydrazide (LIII), followed by Curtius rearrangement of the intermediate acyl azide and alkaline hydrolysis results in the target amine (V) (2). Scheme 4.

2 Plouvier, B.M.C., Chou, D.T.H., Jung, G. et al. (Cardiome Pharma Corp.). Synthetic process for aminocyclohexyl ether compounds. WO 2006088525.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(V) 65266 (1R,2R)-2-[2-(3,4-dimethoxyphenyl)ethoxy]cyclohexylamine   C16H25NO3 详情 详情
(X) 65272 3,4-dimethoxyphenethyl trichloroacetimidate   C12H14Cl3NO3 详情 详情
(XI) 38711 2-(3,4-dimethoxyphenyl)-1-ethanol 7417-21-2 C10H14O3 详情 详情
(XLII) 11889 ethyl 2-oxocyclohexanecarboxylate; Ethyl 2-cyclohexanonecarboxylate 1655-07-8 C9H14O3 详情 详情
(XLIII) 15589 ethyl 2-hydroxycyclohexanecarboxylate; Ethyl cis-2-hydroxy-1-cyclohexanecarboxylate 6149-52-6 C9H16O3 详情 详情
(XLIV) 65300 cis-2-Hydroxy-1-Cyclohexanecarboxamide; (1R,2S)-2-Hydroxy-1-Cyclohexanecarboxamide; Zinc01081409 73045-98-4 C7H13NO2 详情 详情
(XLV) 65301     C7H12NaNO2 详情 详情
(XLVI) 65302     C17H25NO4 详情 详情
(XLVII) 65303     C14H16O3 详情 详情
(XLVIII) 65304     C14H18O3 详情 详情
(XLIX) 65305     C24H30O5 详情 详情
(L) 65306     C16H24O5 详情 详情
(LI) 65307 Ethyl trans-2-hydroxycyclohexanecarboxylate 3444-72-2 C9H16O3 详情 详情
(LII) 65308     C19H28O5 详情 详情
(LIII) 65309     C17H26N2O4 详情 详情
Extended Information