A process for the preparation of clopidogrel (1) ##STR00001## by reaction of the N,N'-bis-4,5,6,7-tetrahydro-[3,2-c]-thienopyridyl methane (12) ##STR00002## with (R)-2-chlorophenylacetic acid derivatives of formula (13) ##STR00003## in which X and R have the meanings as indicated in the disclosure.
