2-(1,2-Dibromoethyl)pyridine hydrobromide → 7-Ethoxy-2,3-dihydro-2-(2-pyridyl)thiazolo[3,2-a]benzimidazole

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Reaction Steps

5-Ethoxy-2-mercaptobenzimidazole (6.03 g) was suspended in 2-methylpropan-2-ol (100 ml) at 50° C. Potassium tert-butoxide (3.48 g) was added and the mixture stirred for 1 hour. The temperature was allowed to fall to 35° C. and 2-(1,2-dibromoethyl)pyridine hydrobromide (10.76 g) was added. The resulting mixture was stirred for 1 hour at 35° C. and then 2 hours at reflux.

Provenance & Evidence