Piperazides of substituted phenylalanine derivatives as thrombin inhibitors

摘要

PCT No. PCT/CH94/00026 Sec. 371 Date Jan. 5, 1995 Sec. 102(e) Date Jan. 5, 1995 PCT Filed Feb. 9, 1994 PCT Pub. No. WO94/18185 PCT Pub. Date Aug. 18, 1994The present invention relates to D,L-, L- and D-phenylalanine piperazides of formula (I) defined in claim 1 that inhibit blood coagulation, and thrombin and/or trypsin, respectively. The compounds are extraordinarily absorbable after oral, intraduodenal and in particular rectal administration and show only a low toxicity.