Synthesis of Some New Enamine-type Quaternary Ammonium Compounds
会议名称：《中国化学会第四届有机化学学术会议》
会议日期：2005年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
摘 要：正The Stevenes rearrangement of nitrogen ylide was one of the most important methods for constructing quaternary carbon in the synthesis of heterocycle *** as we showed in Scheme 1, we did not get the expected quaternary ammonium compounds 3a-3c （the precursor compound of Stevenes rearrangement）, however we gained the enamine-type quaternary ammonium compounds 4a-4c and 5b-5c in the yield of 95% and 5% respectively. The compounds 4a-4c were some new enamine-type quaternary ammonium compounds which were formed by the sequential deprotonation and O-alkylation of precursor compounds 3a-3c. Such reaction was never