Reduction of substituted spiro[cyclopropane-3-(1-pyrazolines)] to spiro[cyclopropane-3-pyrazolidines] and 1-(2-aminoethyl)cyclopropylamine derivatives
作者:I. V. Kostyuchenko、E. V. Shulishov、V. A. Korolev、V. A. Dokichev、Yu. V. Tomilov
DOI:10.1007/s11172-006-0156-8
日期:2005.11
Raney nickel-catalyzed hydrogenation of 5-substituted spiro[cyclopropane-3-(1-pyrazoline)]-5-carboxylates occurs with N—N bond cleavage with simultaneous cyclocondensation to give 3-aminopyrrolidin-2-ones containing a spirocyclopropane fragment. The presence of the second ester group in the pyrazoline side chain, in the position ensuring the formation of a five-membered ring results in 6,11-diazadispiro[2
雷尼镍催化的 5-取代螺[环丙烷-3-(1-吡唑啉)]-5-羧酸盐氢化发生 N-N 键断裂,同时发生环缩合反应,得到含有螺环丙烷片段的 3-氨基吡咯烷-2-酮。吡唑啉侧链中第二个酯基团的存在,在确保形成五元环的位置导致 6,11-二氮杂二螺[2.1.4.2]十一烷-7,10-二酮,双环缩合的产物中间体二胺。芳基取代的螺[环丙烷-3-(1-吡唑啉)]在丙酮存在下氢化得到六氢螺[环丙烷-4-嘧啶],其可在个体中转化为含环丙烷的1,3-二胺状态或盐。