Periselectivity Switch of Acylketenes in Cycloadditions with 1-Azadienes: Microwave-Assisted Diastereoselective Domino Three-Component Synthesis of α-Spiro-δ-lactams
作者:Marc Presset、Yoann Coquerel、Jean Rodriguez
DOI:10.1021/ol101938r
日期:2010.9.17
straightforward three-component stereoselective access to a variety of α-spiro-δ-lactams following an imination/Wolff rearrangement/[2 + 4] cycloaddition domino sequence. With aniline derivatives, a complementary aza-Wittig/Wolff rearrangement/[2 + 4] sequence was developed. These reactions feature an unprecedented reactivity of acylketenes as dienophiles in 6π electrocyclic processes.
在伯胺和α,β-不饱和醛的存在下,微波辅助的环状2-重氮-1,3-二酮的沃尔夫重排反应提供了直接的三组分立体选择性地进入多种α-螺环-δ-内酰胺的途径胺化/沃尔夫重排/ [2 + 4]环加成多米诺序列。使用苯胺衍生物,开发了互补的aza-Wittig / Wolff重排/ [2 + 4]序列。这些反应的特征是在6π电动过程中,酰基烯酮作为亲二烯体具有前所未有的反应性。