Generation and trapping of cyclopropyldiazonium and diazocyclopropane in the nitrosation of cyclopropylamine with alkyl nitrites
作者:Yu. V. Tomilov、G. P. Okonnishnikova、E. V. Shulishov、O. M. Nefedov
DOI:10.1023/b:rucb.0000035655.90713.05
日期:2004.3
Diazocyclopropane and an cyclopropyldiazonium ion, which are highly reactive intermediates, can be generated and trapped by appropriate substrates immediately in the direct nitrosation of cyclopropylamine with alkylnitrites. Diazocyclopropane is trapped by unsaturated compounds to form the corresponding 1,3-dipolar cycloadducts, while cyclopropyldiazonium reacts with reactive arenes and CH acids (e
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
Raneynickel-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