2,3-Dihydro-2,2-dimethyl-7-isopropyl benzofuran and 2-(2,3-dihydro-2,2-dimethyl-7-benzofuranyl)isopropyl hydroperoxide

摘要

A process for the preparation of carbofuran which process comprises converting sigma -isopropylphenol to 2,3-dihydro-2,2-dimethyl-7-isopropylbenzofuran (I); reacting (I) with an oxygen containing gas to form 2-(2,3-dihydro-2,2-dimethyl-7-benzofuranyl)-isopropyl hydroperoxide (II); catalytically decomposing (II) to form 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran (III); reacting (III) with methyl isocyanate to form 2,3-dihydro-2,2-dimethyl-7-benzofuranyl N-methylcarbamate (carbofuran) and recovering said carbamate. New compounds useful as intermediates in the above process are also described.