A Direct Route to <i>C</i>-Vinylaziridines: Reaction of <i>N</i>-Sufonylimines with Allylic Ylides under Phase-Transfer Conditions or with Preformed Ylides at Low Temperature
作者:An-Hu Li、Li-Xin Dai、Xue-Long Hou、Min-Bo Chen
DOI:10.1021/jo952245d
日期:1996.1.1
reaction has also been carried out with preformed ylides, generated from sulfonium salts 3, 7, arsonium salt 14, and telluronium salts 15, 16 with a base in THF at -78 degrees C. In most examples, quantitative yields were achieved. However, the trans/cis selectivity of the reaction was not high in either case. A semistable allylic sulfonium ylide, i.e., dimethylsulfonium 3-(trimethylsilyl)allylide, was found
烯丙基K盐3、5、7、11、12、13和ar盐14在KOH存在下于室温下在固液相转移条件下与芳族,杂芳族和α,β-不饱和N-磺酰亚胺类化合物反应在几分钟内以优异的产率分别生产乙烯基,(β-苯基乙烯基)-和[β-(三甲基甲硅烷基)乙烯基]氮丙啶。在某些情况下,吡咯啉化合物9是次要产物。该叠氮化反应也已经用在碱中在-78℃下由from盐3、7,son盐14和碲盐15、16产生的预形成的叶立德进行了。在大多数实例中,实现了定量收率。然而,在两种情况下,反应的反式/顺式选择性都不高。半稳定的烯丙基sulf叶立德,即