Reactions of 2-Aryl-2<i>H</i>-cycloheptathiazoles with Dimethyl Acetylenedicarboxylate
作者:Noritaka Abe、Satoshi Kondo、Koichi Morita
DOI:10.1246/bcsj.60.1201
日期:1987.3
Reaction of 2-aryl-2H-cycloheptathiazoles with dimethylacetylenedicarboxylate gave dimethyl 2-aryl-3H-1-thia-2a-azacyclopent[cd]azulene-3,4-dicarboxylate, tetramethyl 6-phenyl-2,3,4,5-pyridinetetracarboxylate, and tetramethyl 5-[(thioaroyl)iminomethyl]-1,2,3,4-naphthalenetetracarboxylate.
Studies on Heteropentalenes. V. Cycloadditions of 5-Aryl-3-methylimidazo[5,1-<i>b</i>]thiazoles with Acetylenic Esters Leading to 5-Aryl-3-methylthiazolo[2,3-<i>c</i>]benzimidazoles and Related Heterocycles
作者:Noritaka Abe、Tarozaemon Nishiwaki、Kotaro Ikeda
DOI:10.1246/bcsj.55.2464
日期:1982.8
Cycloaddition of 5-aryl-3-methylimidazo[5,1-b]thiazoles with dialkyl acetylenedicarboxylate in an aprotic nonpolar solvent gives a number of products including epimeric thiazolo[2,3-c]benzimidazoles (3 and 4) [1:2-cycloadducts], epimeric 5,10b-ethenothiazolo[3′,2′:3,4]imidazo[1,5-a]-pyridines (5 and 6) [1:3-cycloadducts], and thiazolo[3′,2′:3,4]imidazo[1,2-a]pyridines [1:3-adducts]. At higher temperature