Gold‐Catalyzed One‐Step Construction of 2,3‐Dihydro‐1
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‐Pyrrolizines with an Electron‐Withdrawing group in the 5‐position: A Formal Synthesis of 7‐Methoxymitosene
作者:Ze‐Yi Yan、Yuanjing Xiao、Liming Zhang
DOI:10.1002/anie.201203678
日期:2012.8.20
What a ring formation! Bicyclic dihydropyrrolizines with an electron‐withdrawing group (EWG) at the 5‐position are formed in one step from linear azidoenynes under goldcatalysis. This novel route involves the use of azide as a nitrene precursor, electronically‐controlled regioselectivity, and the generation of destabilized 1‐azapentadienium ions and their pericyclic reactions. This method was used