| abstract |
A process for the preparation of indole derivatives of the general formula CHj-N -NHCOUHCORj RE where RI is hydrogen, 5-OXI-, 5- (C4-Mn) alkoxy, 7-C | -C |, -alkyl; Rj is hydrogen, C 4 -C alkyl; Rj is phenyl, 3-C;, - C |, alkoxyfesch, 4-C4-Cif-alkoxyphenyl, 4-halophenyl, thieyl; or addition salts thereof, characterized in that the indole derivative of the formula where R4 and R; have the indicated values, are reacted with a compound of the formula (L RjCOWHCONHa with where RJ has the indicated values, orbore rates during addition) inert solvent, and the target product is isolated in free form or in the form of an additive salt. |