Hirai,K. et al., Chemical and pharmaceutical bulletin, 1972, vol. 20, p. 97 - 101
作者:Hirai,K. et al.
DOI:——
日期:——
Synthesis of Heterocyclic Ketene<i>N,S</i>-Acetals and Their Reactions with Esters of α,β-Unsaturated Acids
作者:Zhi-Tang Huang、Xian Shi
DOI:10.1055/s-1990-26822
日期:——
Ketene S,S-acetals 2 react with 2-amino-1-ethanethiol to afford the substituted 2-methylenethiazolidines 3. The structure of these products as ketene N,S-acetals is confirmed by spectroscopic data. Compounds 3a-f react with esters of α,β-unsaturated acids to give thiazolo[3,2-a] pyrid-5-one derivatives 4, 6, and 7 through an electrophilic addition and cyclocondensation sequences.