| 摘要 |
An asymmetrical hydrazine derivative of formula V <IMAGE> (V) where R1 is alkoxy of 1 to 18 carbon atoms or cycloalkyl of 5 to 12 carbon atoms; X is -O- or -NR2- where R2 is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, alkyl of 2 to 4 carbon atoms substituted by one alkoxy group of 1 to 12 carbon atoms or a group of formula II <IMAGE> II in which R1 is as defined above; and E is a alkyl of 1 to 20 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 14 carbon atoms or phenylalkyl of 7 to 22 carbon atoms, or E is -CONHR4, -CSNHR5, -COR6COR7, -COR8CONHR9, -COR10, -COOR11 or -SO2R12, in which R4, R5, R7, R9, R10, R11 and R12 are each independently of the other hydrogen, alkyl of 1 to 20 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 14 carbon atoms or phenylalkyl of 7 to 22 carbon atoms; and R6 and R8 are each independently of the other an alkylene of 1 to 12 carbons.
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