作者:Jack Deruiter、Deborah Ann Carter、Wilmer Scott Arledge、Patrick J. Sullivan
DOI:10.1002/jhet.5570240128
日期:1987.1
or piperidine, 4a-d failed to yield conjugate addition products, presumably due to the steric bulk provided by the two methyl substituents of the isopropylidene side chain. Reaction of 4a-d with hydrazine derivatives gave the 1-aryl-3-methyl-2-pyrazolin-5-ones 3a-d and isopropyl-hydrazones. Treatment of 4a with potassium cyanide yielded a stable conjugate addition product which exists as a mixture of
在各种条件下研究了4-异亚丙基-1-芳基-3-甲基-2-吡唑啉-5-酮4a-d的反应。在硫醇或哌啶的存在下,4a-d未能产生共轭加成产物,这可能是由于异亚丙基侧链的两个甲基取代基所提供的空间体积。4a-d与肼衍生物反应,得到1-芳基-3-甲基-2-吡唑啉-5-酮3a-d和异丙基hydr。用氰化钾处理4a得到稳定的共轭加成产物,其以互变异构体的混合物形式存在于不同溶剂中。此外,用过氧化氢氧化4a可获得螺环氧化物22,而间氯过苯甲酸氧化既提供了螺环氧化物22,又提供了少量的羟基螺环氧化物23。