PROCESS FOR PREPARING SUBSTITUTED BENZOYL-(THIO)-UREAS

摘要

The title compds. (I; R1 = H' halogen or alkayl; R2 = H or halogen; X = O or S; Y = H, halogen, alkyl, or halogenoalkyl; A = fluoro- or chlorofluoroalkylene), useful as insecticides, were prepd. Thus, 3.66 g 2,6-F2C6H3CONCO in 20 ml PhMe was added at 60≦̸C to 4.8 g 6-amino-3- chloro-2,2,3-trifluoro-1,4-benzodioxane in 40 ml PhMe, and the mixt. was stirred 1 hr at 80≦̸C to give 98% II.