Imidazo [1,2-a] pyrazin-4-one derivatives, their preparation and medicaments containing them

摘要

PCT No. PCT/FR94/00865 Sec. 371 Date Jan. 16, 1996 Sec. 102(e) Date Jan. 16, 1996 PCT Filed Jul. 11, 1994 PCT Pub. No. WO95/02602 PCT Pub. Date Jan. 26, 1995 (I) Compounds of formula (I), wherein R is an oxygen or sulphur atom or an NH or N-alk radical, and each of R1 and R2, which are the same or different, is a hydrogen or halogen atom or an alkyl, alkoxy, amino, acylamino, -NH-CO-NH-Ar,-N=CH-N(alk)alk', nitro, cyano, phenyl, imidazolyl or SO3H radical, the preparation thereof, and drugs containing such compounds, are disclosed.