Peptide compounds derived from boronic acid process for preparing them and pharmaceutical compositions containing them

摘要

The invention relates to the compounds of formula (I): in which: R1 represents a hydrogen atom or an acyl, alkyl, benzyl, alkoxycarbonyl, benzyloxycarbonyl, phenoxycarbonyl, 5-[(dimethyl)amino]naphthylsulphonyl, alkoxycarbonylmethyl or carboxymethyl group, R2 represents a hydrogen atom or a phenyl, substituted or unsubstituted benzyl, thienyl-3-methyl, (pyrid-2-yl)methyl, diphenylmethyl, fluorenyl, naphthylmethyl, benzocyclobutyl, (dicyclopropylmethyl)methyl, indanyl or cyclo(C3-C7)alkylmethyl group, R'2 represents a hydrogen atom or a benzyl group or else R2 and R'2 together represent C6H5-CH=, R3 represents a cycloalkyl, aminobenzyl, amidinobenzyl, guanidinobenzyl, aminophenyl, amidinophenyl, guanidinophenyl or substituted alkyl group, R4 and R5 each represent a hydrogen atom or an alkyl group, or forms a boronic ester of pinanediol, A represents any one of the groups as defined in the description. These compounds are useful as inhibitors of trypsin-like serine proteases such as thrombin.