Nitro- and amino-pyrocatechols

Abstract

Mononitration of pyrocatechol monobenzenesulphonate gave 4-nitropyrocatechol 2-benzenesulphonate and 3-nitropyrocatechol 1-benzenesulphonate. More vigorious conditions of nitration yielded 3,5-dinitropyrocatechol 1-benzenesulphonate. From these compounds the corresponding nitropyrocatechols and their acetates, benzene-sulphonates, and methyl ethers were prepared. Reduction of the mononitro-compounds gave the corresponding aminopyrocatechols, from which several acetyl derivatives were prepared.