Reaction of enaminothiones with diphenylcyclopropenone. Synthesis of 4,5-dimethylenecyclopentenone derivatives
作者:Albert Kascheres、Concetta Kascheres、A. C. Herrera Braga
DOI:10.1021/jo00059a017
日期:1993.3
Diphenylcyclopropenone (1) reacts with enaminothiones 2 to afford 4,5-dimethylenecyclopentenone derivatives 3. The results of AM1 calculations performed on both geometrically optimized 2a and the oxygen analog in the Z,s-cis-configuration favor a mechanism in which the sulfur atom of 2 acts as a nucleophile at the phenyl-C of 1.
An Improved Preparation of Vinylogous Thiocarboxamides
作者:Wolfgang Walter、Theo Proll
DOI:10.1055/s-1979-28879
日期:——
[14 + 2] -cycloadditionen von enaminothionen mit maleinsäureanhydrid