Ring-Chain Tautomerism in Organic Synthesis: Synthesis of Heterocyclic Enamines from a Novel and Practical Formal Ring Transformation Reaction of Lactones
作者:Mei-Xiang Wang、Yong Liu、Hong-Yun Gao、Yan Zhang、Chu-Yi Yu、Zhi-Tang Huang、George W. J. Fleet
DOI:10.1021/jo026560t
日期:2003.4.1
A novel approach to heterocyclic enamines has been developed from the formal ring transformation reaction of lactones. The synthesis comprises consecutive Reformatsky reaction of lactones and mesylation of the resulting mixture of ring-chain tautomers in a one-pot reaction, followed by cyclocondensation reaction with primary amines. The synthetic application of this method was demonstrated by a straightforward