SUBSTITUTED PHTHALIMIDO-CINNAMIC ACID DERIVATIVES WITH HERBICIDAL EFFECT

摘要

Substd. phthalimido cinnamic acid derivs. of formula (I) and their salts are new: R<1> = H or 1-4C alkyl; R<2> = H or halo; R<3> = CN, NO2, halo, etc.; R<4> = H, CN, NO2, etc.; R<5> = H, 1-6C alkyl, 2-6C alkenyl, etc.; R<6> = as defined for R<5> or is CN, NO2, 1-6C alkoxy, etc.; or R<5>+R<6> = a 2-6 membered alkylene chain in which one CH2 unit is replaced with O or 1-4C alkylimino; R<7> = H, 1-6C alkyl, 3-6C alkenyl, etc.; X = O, S or NR<8>; R<8> = as defined for R<7> or (1-6C alkoxy)carbonyl, etc.; or R<8>+R<6> = a 3-5 membered alkylene chain in which one CH2 gp. which is not terminal is replaced with O or 1-4C alkylimino or the CH2 unit attached to N is replaced with CO.