Alpha, alpha-disubstd. formylidene-phenyl-hydrazine fungicides - prepd. e.g. by reacting N-acyl phenyl-hydrazine with phosphorus pentachloride and amine or mercaptan

摘要

Cpds. of formula (I) are new (where a, b, c, d and e, each = H, halo, 1-6C alkyl, 1-4C alkoxy, OH, NO2, CF3, CCl3 or CBr3; A is X is 1-6C alkyl, aryl, alkyl- or arylamino or alkyl- or arylthio (all opt. substd.) or halo; B is an opt. substd. (cyclo)aliphatic-, aromatic- or heterocyclic-amino gp., SH or opt. substd. alkyl- or arylmercapto). (I) are plant fungicides, esp. effective against Peronospora and with low phytotoxicity. They can be used for protection or treatment. Dose is 1000-3000 ppm.