To obtain the subject new compound useful as agrochemicals for controlling damages to agricultural or horticultural crops by diseases.
This compound is shown by formula I [R1 is H, a 1-8C alkyl or the like; A is shown by formula (R2 and R3 are each H, a halogen or the like; and (m) is an integer of 0-4) or the like; and B is a 5- to 6-membered heterocycling ring comprising 1 to 3 heteroatoms selected from the group consisting of a cyano, O, N and S, or like], e.g. 4-methyl-1,2,3-thiadiazole-5- carbaldehyde. The compound shown by formula I is obtained by, e.g. oxidizing, in the presence of oxidizing agent, the product from the reduction of a compound shown by formula III (R11 is a 1-8C alkyl) in the presence of a reducing agent, with or without isolating the product prior to the oxidation. This compound shows a very high controlling effect against crop diseases, including bacterial diseases, e.g. rice blast, wheat powdery mildew, grape downy mildew and cabbage slimy soft rot, and viral diseases, e.g. tobacco mosaic.
SHIMAOKA TAKASHI
SANPEI OSAMU
TANIYAMA YOSHITAKA
TAKAGI KAZUHIRO
NISHIGUCHI TSUTOMU
TAJIMA SOKICHI
