| abstract |
A process for the preparation of carbofuran which is used as an insecticide. Carbofuran is the N-methylcarbamate of 7-benzofuranol. Carbofuran is prepared by reacting catechol with beta methallyl halide or the alcohol in the presence of a catalyst composite containing a heteropoly acid and reacting the 7-hydroxy 2, 3, dihydro-2, 2, dimethyl benzofuranol thus obtained with methyl isocyanate or with phosgene and methylamine to obtain carbofuran. |