| 摘要 |
Cyclobutanecarboxylic acid imides of the formula I <IMAGE> (I) wherein one of R1 and R6 is hydrogen, methyl or ethyl, and the other is methyl or ethyl, R2 and R3 independently of one another are each hydrogen, fluorine or methyl, or R2 is acetoxy or chlorine while R3 is hydrogen, and wherein R4 is hydrogen, methyl or chlorine, and R5 is hydrogen or methyl, whereby R3 and R4 together can also form an additional bond in the four-membered ring, are suitable for combating various fungi and have a particularly excellent action against Botrytis. They can be produced in an especially advantageous manner by photochemical [2+2] cycloaddition of alkenes or alkynes with for example appropriately substituted maleic acid-(3,5-dichlorophenyl)imides. |
