Catalytic hydrogenation of methyl esters of some 1h-pyrazoline-3-carboxylic acids
作者:V. A. Gorpinchenko、D. V. Petrovcx、S. S. Lozhkin、E. G. Galkin、V. A. Dokichev
DOI:10.1007/s10593-010-0408-2
日期:2009.10
Hydrogenation over Raney nickel of the methyl ester of 1H-pyrazoline-3-carboxylic acid and also of its 4-phenyl and 5-methoxycarbonyl-substituted analogs, leads respectively to 3-aminopyrrolidin-2-one, its 4-phenyl- and 5-methoxycarbonyl derivatives, predominantly to the trans isomer. Under the same conditions 1-amino-4-methoxycarbonylpyrrolidin-2-one was obtained from 3,4-di(methoxycarbonyl)-1H-pyrazoline
1H-吡唑啉-3-羧酸的甲酯及其4-苯基和5-甲氧基羰基取代的类似物在阮内镍上的氢化分别导致3-氨基吡咯烷酮-2-酮,其4-苯基和5。 -甲氧基羰基衍生物,主要是反式异构体。在相同条件下,从3,4-二(甲氧基羰基)-1H-吡唑啉制得1-氨基-4-甲氧基羰基吡咯烷-2-酮,但3,4,5-三(甲氧基羰基)-1H-吡唑啉未反应。