Ring contraction of a 5-acetylpyrimidine into pyrazoles by the action of substituted hydrazines in acidic medium
作者:Gabriel Menichi、Mohamed Boutar、Bruno Kokel、Kaname Takagi、Michel Hubert-Habart
DOI:10.1002/jhet.5570230157
日期:1986.1
M.G.B.G. pointed out to a new possibility of ring contraction of pyrimidines into pyrazoles. We attempted therefore to study the possibility of extending this transformation to other substituted hydrazines and to define more accurately the conditions of this reaction as well as to prepare new potential anticancer drugs.
以前我们已经发现,两个5-乙酰基-4-甲基嘧啶可以被氨基胍盐酸盐转化成4-乙酰基-1-ami基-3-甲基吡唑基a盐二盐酸盐。该反应除了会导致与抗肿瘤药物MGBG密切相关的分子外,还指出了嘧啶环收缩为吡唑的新可能性。因此,我们试图研究将这种转化扩展到其他取代的肼的可能性,并更准确地定义该反应的条件以及制备新的潜在抗癌药。