Synthesis of 2(3H)-imidazolethiones and 2(3H)-imidazolones from β,γ-alkynyl carbanilides
摘要:
beta, gamma-Acetylenic carbanilides cyclize and subsequently isomerize to 2(3H)-Imidazolethiones and 2(3H)-Imidazolones upon treatment with ammoniacal H2S and KOH in t-BuOH respectively.
Synthesis and Mercury (II) Trifluoroacetate Mediated Cyclization of N-Aryl -Allenylmethyl Carbamide
作者:B. Devan、K. Rajagopalan
DOI:10.1080/00397919408010171
日期:1994.6
three step sequence is described for conversion of substituted phenyl carbamide into 1-cyano-4-methylidene -1,2,3,4-tetrahydro quinoline involving N-propargylation, allene formation followed by mercury (II) trifluoro acetate catalysed cyclization.