PROCESS FOR PREPARING THE 2-ACETOXY-5-(2-FLUOR-α-CYCLOPROPYL-CARBONYL-BENZYL)-4,5,6,7-TETRAHYDRO-4H-TIENO3,2-CPYRIDINE, FORM CRYSTALLINE 5-TRITYL-4,5,6,7-TETRAHYDRO-TIENO3,2-CPYRIDINE AS INTERMEDIATES

摘要

The object of the present invention is a process for preparing the 2-acetoxy-5-(2-fluor-(-cyclopropyl-carbonyl-benzyl)-4,5,6,7-tetrahydro-4H-tieno[3,2-c]pyridine (prasugrel) of the formula (I). The process starts form crystalline 5-trityl-4,5,6,7-tetrahydro-tieno[3,2-c]pyridine of the formula (VI). Further objects of the present invention are two novel crystalline forms of 5-trityl-4,5,6,7-tetrahydro-tieno[3,2-c]pyridine of the formula (VI) and the use thereof for preparing the compound of the formula (V) and process preparing thereof.