Multicomponent Synthesis of Pyrroles from Cyclopropanes: A One-Pot Palladium(0)-Catalyzed Dehydrocarbonylation/Dehydration
作者:William J. Humenny、Polydoros Kyriacou、Katarina Sapeta、Avedis Karadeolian、Michael A. Kerr
DOI:10.1002/anie.201206177
日期:2012.10.29
es yields tetrahydro‐1,2‐oxazines, which in turn undergo a Tsuji dehydrocarbonylation to give dihydro‐1,2‐oxazines (see scheme; dba=dibenzylideneacetone). Addition of base to this reaction mixture results in clean conversion to pyrroles. The result is a flexible three‐component strategy for the synthesis of tetrasubstituted pyrroles.
把握住变化:将硝酮与1-碳烯丙氧基-1-甲氧基甲氧基环丙烷环加成生成四氢1,2-恶嗪,然后将其进行Tsuji脱氢羰基化反应生成二氢1,2-恶嗪(参见方案; dba =二苄基亚甲基丙酮)。向该反应混合物中加入碱导致干净地转化为吡咯。结果是灵活的三组分策略,用于合成四取代的吡咯。