A Powerful New Strategy for Diversity-Oriented Synthesis of Pyrroles from Donor−Acceptor Cyclopropanes and Nitriles
作者:Ming Yu、Brian L. Pagenkopf
DOI:10.1021/ol036180+
日期:2003.12.1
Lewis acid activated donor-acceptor cyclopropanes react with aliphatic, aromatic, and alpha,beta-unsaturated nitriles in a novel cascade [3 + 2] dipolar cycloaddition, dehydration, and tautomerization sequence to afford pyrroles in moderate to excellent overall yield. This cost-effective and regiospecific method is ideally suited for the preparation of combinatorial libraries. [reaction: see text]
路易斯酸活化的供体-受体环丙烷与脂肪族,芳香族和α,β-不饱和腈以新型级联[3 + 2]偶极环加成,脱水和互变异构顺序反应,以中等到极好的总收率提供吡咯。这种具有成本效益和区域特异性的方法非常适合于制备组合文库。[反应:看文字]