Preparations of Trisubstituted Hydrazines and Pyrazolidines from <i>N</i>-(1-Benzotriazolylalkyl)hydrazines
作者:Alan R. Katritzky、Guofang Qiu、Baozhen Yang
DOI:10.1021/jo9709110
日期:1997.11.1
Reactions of N,N'-disubstituted hydrazines with benzotriazole and aldehydes give N-(alpha-benzotriazoylalkyl)-N,N'-disubstituted hydrazines which on treatment with organometallic reagents form N-alkyl-N,N'-disubstituted hydrazines in good yields. N-(Benzotriazolylalkyl)-N,N'-disubstituted hydrazines and electron-rich olefins, in the presence of zinc bromide catalyst, generate N,N'-disubstituted pyrazolidines
N,N′-二取代的肼与苯并三唑和醛的反应得到N-(α-苯并三唑基烷基)-N,N′-二取代的肼,其在用有机金属试剂处理后以良好的产率形成N-烷基-N,N′-二取代的肼。 。在溴化锌催化剂存在下,N-(苯并三唑基烷基)-N,N'-二取代的肼和富电子烯烃会以中等至良好的产率生成N,N'-二取代的吡唑烷。