| 摘要 |
<p>Title cpds. of formula (I) (where R1 and R2 are aliphatic aromatic or heterocyclic residues, or NR'R2 is a ring system opt. also contg. further hetero atoms, and R3 and R4 are H or aliphatic, aromatic or heterocyclic residues, or one of R3 adn R4 can also be a group COR5, SO2R5, CONHR5 or CSNHR5 in which R5 is H or an aliphatic, aromatic or heterocyclic residue) which are of use as plant-protection agents, are prepd. by reacting R'R2N-C(Hal)=N-CO-OR (where R is an aliphatic, aromatic or heterocyclic residue and Hal is halogen) with R3-NH-NH-R4 at -30 to +100 degrees C (pref. 0-80 degrees C), pref. in an inert diluent.</p> |
