3- (1H-tetrazol-5-yl) thieno 2,3-d pyrimidin-4 (3H) -ones

摘要

3-(1H-Tetrazol-5-yl)thieno[2,3-d]pyrimidin-4(3H)-ones useful as antiallergic agents are described herein. The compounds are prepared by cyclization of an appropriate substituted amidine using an alkali metal base. The reaction is carried out in an appropriate inert solvent.