Radical cyclisations of propargyl bromoamides and propargyl bromoesters. New routes to tetramic acids, pyrrolinones, tetronic acids and butenolides
作者:John M. Clough、Gerald Pattenden、Paul G. Wight
DOI:10.1016/s0040-4039(00)70728-3
日期:1989.1
Radical cyclisations of the propargyl bromoamides (5) and (9), and the propargyl bromoesters (17) and (21-), produce precursors (6), (10), (18) and (22), to the tetramic acids (8) and (12), the pyrrolinones (7) and (11), the tetronic acids (20) and (23), and the butenolides (19) and 24), in high overall yields.
炔丙基bromoamides(5)和(9)的基团环化,和炔丙基溴酯(17)和(21 - ),产生的前体(6),(10),(18)和(22),到特特拉姆酸( 8)和(12),吡咯烷酮(7)和(11),tetronic酸(20)和(23)以及丁烯内酯(19)和24),总收率高。