| abstract |
Intermediates represented by general formula (1) in the synthesis of biphenylamidine derivatives to be used as inhibitors for activated blood coagulation factor X and a process for producing the same, wherein R1 represents hydrogen, alkyl, aryl, aralkyl, etc.; and X represents carboxy, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, formyl, -CH¿2?-Y, -CHZ1Z2, -CH(OR?4)OR5¿, etc. |