Cesium carbonate → 2-[6-(4-Chloro-butoxy)-benzoimidazol-1-yl]-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid amide

Participants

Reaction Steps

A mixture of 0.185 g (0.5 mmole) of 4-(3-chloro-phenyl)-2-(6-hydroxy-benzoimidazol-1-yl)-thiazole-5-carboxylic acid amide (I.25d), 1.5 mL of dimethylformamide, 0.813 g (2.5 mmole) of cesium carbonate and 0.173 mL (1.5 mmole) of 1-bromo-4-chloro-butane was heated at 100 degrees for 1 hour. The mixture was concentrated under reduced pressure, diluted with water and the resulting precipitate collected by filtration. The solid was triturated with diethyl ether to give 0.279 g of 2-[6-(4-chloro-butoxy)-benzoimidazol-1-yl]-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid amide (I.37a) as a light brown solid.

Provenance & Evidence