PHOSPHONOUS ACID DERIVATIVES, THEIR PREPARATION AND THEIR USE IN COMBATING MICROORGANISMS

摘要

Phosphonous acid derivatives of the general formula I (I) or the corresponding zwitterion form, in which R, R1, R2 and R3 have the meanings given hereinafter, are valuable microbicides. They are being manufactured according to known methods of peptide synthesis and may be used to protect plants from the attack of plant-pathogenic bacteria and fungi.