The generation of iminium ions using chlorosilanes and their reactions with electron rich aromatic heterocycles
作者:Harry Heaney、George Papageorgiou、Robert F. Wilkins
DOI:10.1016/s0040-4020(96)01174-x
日期:1997.2
have been used to generate iminium ions from aminals and aminol ethers derived from secondary alkylamines, including glycine derivatives, in aprotic media which were shown to undergo reactions with electron rich aromatic heterocycles, including furan, to give mono-aminoalkylation products in good yields. Whereas chlorotrimethylsilane has been shown to generate iminium ions from aminol ethers, no evidence
二氯二甲基硅烷和三氯甲基硅烷已被用于在质子惰性介质中从衍生自仲烷基胺(包括甘氨酸衍生物)的缩醛和氨基醚生成亚胺离子,该非质子介质已显示与富电子芳族杂环(包括呋喃)发生反应,从而得到良好的单氨基烷基化产物产量。氯三甲基硅烷已被证明可以从氨基醚中产生亚胺离子,但没有证据表明亚胺类化合物参与了亚胺离子的产生。的2,5-二取代Ñ -methylpyrrole在反应中的主要结果Ñ-甲基吡咯与缩醛在氯三甲基硅烷的存在下发生,其中没有氯化氢的积累发生,并且氯三甲基硅烷可以催化作用。实验结果,包括使用双(三甲基甲硅烷基)乙酰胺作为质子清除剂,以及一些相对速率数据,可以评估可能的机理。