N-Allylideneamines 1a, b were prepared from acrolein and diphenylethyl or trityl amine in the presence of Ti(OEt)4. Double nucleophilic addition of various ketene silyl (thio)acetals and trimethylsilyl cyanide to these imines proceeded efficiently to give, after workup with TFA, homoglutamic acid derivatives 3 and valerolactam 5.
由
丙烯醛和二苯乙基或三苯甲基胺在Ti(OEt)4存在下制备N-亚烷基胺1a,b。各种烯酮甲
硅烷基(
硫代)
缩醛和三甲基甲
硅烷基
氰化物向这些
亚胺的双亲核加成反应有效进行,用TFA处理后得到高谷
氨酸衍
生物3和戊内酰胺5。