INDUSTRIAL PROCESS FOR PREPARING ENVIRONMENTALLY SAFE TRICYCLAZOLE

摘要

An improved efficient environmentally safe process for the production of Tricyclazole useful fungicide for rice blast in aqueous slurry form, which involves reacting Hydrazino intermediate (2) obtained from amino compound (1) with formic acid in the presence of p- Toluene sulphonic acid catalyst in two step reaction is discussed. In reaction step (a) 2- Hydrazine -4- methyl benzothiazole (2) is prepared by reacting Amino compound (1) with 80 % Hydrazine Hydrate in the presence of MEG and Hydrochloric acid at 100- 120 ° C. In step (b) the condensation process with 85-98 % formic acid is carried in the presence of acid promotor catalyst at 100- 140° C. The final product is isolated in aqueous slurry form by dumping solvent free molton stirrable mass in precooled water.