Reaction of 3-Iodochromone with Nucleophiles. 2. Reaction with Mercaptoazoles
作者:Yoshiaki Sugita、Shengzhen Yin、Ichiro Yokoe
DOI:10.3987/com-00-9007
日期:——
3-Iodochromone (1a) easily reacted with mercaptoazoles in the presence of potassium carbonate to give 3-azolylthiochromones in good yields. In the case of 2-mercaptobenzimidazole (2a) as a nucleophile, the benzimidazo[2,1-b]thiazole derivative (4a) was obtained as the major product along with 3-(1H-benzimidazol-2-ylthio)chromone (3a). The ratio of the two products was found to be affected by the electron density on the nitrogen atom in the benzimidazole ring.