| abstract |
Benzamidine derivatives of formula (I), and their salts, are new: A =O(2-4C alkylene)O or (1-3C alkylene)O; R1 = 1-6C alkyl or halo; R2 = H, 1-6C alkyl or halo; R3, R4 = H, 1-6C alkyl, 1-6C alkoxy, OH, CF3; or R3+R4 = part of a condensed benzene ring (which may be substituted by OH, 1-4C alkyl or 1-4C alkoxy); R5 = H, aryl, preferably Ph, OPh, CR7R8, COPh or CH(OH) (where the Ph ring may be substituted by OH or 1-4C alkoxy), or C(O)NR9R10; R6 = H, 1-6C alkoxycarbonyl or 1-6C acyl; and R7-R10 = H or 1-8C alkyl. |