PROCESS FOR THE PREPARATION OF 6-SUBSTITUTED S-TRIAGELO(3,4-A)PHTHALAGINE DERIVATIVES

摘要

S-triazolo (3,4-a) phthalazine derivs. of formula (I), useful as anxiolytic agents are prepd.. In (I), R is H, hydroxy, C1-6 alkyl, phenyl, substd. phenyl or substd. amino; R1 is halogen, hydroxy, C1-4 alkylthio, C1-4 alkylsulphinyl, C1-4 alkylsulphonyl, phenyl, substd. phenyl or substd. amino; R2 and R3 are each H, halogen, C1-4 alkyl, C1-4 alkoxy or nitro.