A SYNTHESIS OF SELECTED o,o'-DISUBSTITUTED DIARYLACETIC ESTERS AND DIARYLMETHANES

摘要

A recent project required access to 2-(2-nitrobenzyl)benzoic acid (4a) for a cyclization study to prepare 5,ll-dihydro-6H-dibenz[b,e]azepin-6-one.This compound has been previously synthesized by nitration of 2-benzylbenzoic acid,but it was not purified from the accompanying C-4 nitration product.We,therefore,sought a method to prepare the C-2 nitrated compound in pure form.