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【结 构 式】

【分子编号】38345

【品名】ethyl 2-cyano-2-cyclohexylideneacetate

【CA登记号】

【 分 子 式 】C11H15NO2

【 分 子 量 】193.24564

【元素组成】C 68.37% H 7.82% N 7.25% O 16.56%

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:(III)

The condensation of cyclohexanone (I) with ethyl cyanacetate (II) gives the cyclohexylidene derivative (II), which is cyclized with N-benzylglycine (IV) and formal-dehyde by means of TEA in refluxing benzene yielding the spiro derivative (V). The decarboxylative hydrolysis of (V) with refluxing 6N HCl affords 2-benzyl-2-azaspiro [4,5]decane-4-carboxylic acid (VI), which is esterified with methanol/HCl giving the methyl ester (VII). The debenzylation of (VII) with H2 over Pd(OH)2 in methanol yields 2-azaspiro[4.5]decane-4-carboxylic acid methyl ester (VIII), which is reprotected with benzyl chloroformate and pyridine to provide the carbamate (IX). The hydrolysis of the methyl ester group of (IX) with NaOH in dioxane/water afford the protected carboxylic acid (Xa-b) as a racemic mixture that is treated with oxalyl chloride in dichloromethane to give the acyl chloride (XIa-b). The condensation of (XIa-b) with the chiral (R)(+)-1-(2-naphthyl)ethylamine (XII) yields the amide (XIIIa-b) as a diastereomeric mixture that is resolved by flash chromatography providing chiral (XIV) as a single diastereomer. Finally, this compound is hydrolyzed and deprotected with 6N HCl in refluxing THF.

1 Singh, L.; Bryans, J.S.; Receveur, J.-M.; Horwell, D.C.; Field, M.J.; Synthesis and biological evaluation of conformationally restricted gabapentin analogues. Bioorg Med Chem Lett 1999, 9, 16, 2329.
2 Horwell, D.C.; Bryans, J.S.; Receveur, J.-M. (Pfizer Inc.); Conformationally constrained amino acid cpds. having affinity for the alpha2delta subunit of a calcium channel. WO 9961424 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
10101 Benzyloxycarbonyl chloride; Benzyl chloroformate; 1-[[(Chlorocarbonyl)oxy]methyl]benzene 501-53-1 C8H7ClO2 详情 详情
(Xa) 38351 (4S)-2-[(benzyloxy)carbonyl]-2-azaspiro[4.5]decane-4-carboxylic acid C18H23NO4 详情 详情
(Xb) 38352 (4R)-2-[(benzyloxy)carbonyl]-2-azaspiro[4.5]decane-4-carboxylic acid C18H23NO4 详情 详情
(XIa) 38353 benzyl (4S)-4-(chlorocarbonyl)-2-azaspiro[4.5]decane-2-carboxylate C18H22ClNO3 详情 详情
(XIb) 38354 benzyl (4R)-4-(chlorocarbonyl)-2-azaspiro[4.5]decane-2-carboxylate C18H22ClNO3 详情 详情
(XIIIa) 38356 benzyl (4S)-4-([[(1R)-1-(2-naphthyl)ethyl]amino]carbonyl)-2-azaspiro[4.5]decane-2-carboxylate C30H34N2O3 详情 详情
(XIIIb), (XIV) 38357 benzyl (4R)-4-([[(1R)-1-(2-naphthyl)ethyl]amino]carbonyl)-2-azaspiro[4.5]decane-2-carboxylate C30H34N2O3 详情 详情
(I) 11059 Cyclohexanone 108-94-1 C6H10O 详情 详情
(II) 11877 Cyanoacetic acid ethyl ester; Ethyl 2-cyanoacetate; Ethyl cyanoacetate; Ethyl isocyanacetate 105-56-6 C5H7NO2 详情 详情
(III) 38345 ethyl 2-cyano-2-cyclohexylideneacetate C11H15NO2 详情 详情
(IV) 27895 N-(benzylamino)acetic acid; N-Benzylglycine; 2-(benzylamino)acetic acid 17136-36-6 C9H11NO2 详情 详情
(V) 38346 ethyl 2-benzyl-4-cyano-2-azaspiro[4.5]decane-4-carboxylate C20H26N2O2 详情 详情
(VI) 38347 2-benzyl-2-azaspiro[4.5]decane-4-carboxylic acid C17H23NO2 详情 详情
(VII) 38348 methyl 2-benzyl-2-azaspiro[4.5]decane-4-carboxylate C18H25NO2 详情 详情
(VIII) 38349 methyl 2-azaspiro[4.5]decane-4-carboxylate C11H19NO2 详情 详情
(IX) 38350 2-benzyl 4-methyl 2-azaspiro[4.5]decane-2,4-dicarboxylate C19H25NO4 详情 详情
(XII) 38355 (1R)-1-(2-naphthyl)-1-ethanamine; (1R)-1-(2-naphthyl)ethylamine C12H13N 详情 详情
Extended Information