Reactions of 6a,11a-dihydro-6H-benzofuro[3,2-c]benzopyran
Abstract
Lead(IV) acetate was found to be a suitable dehydrogenating agent for the preparation of 6H-benzofuro[3,2-c]benzopyran from its 6a,11a-dihydro-derivative. The product was also synthesised independently. A scheme for the chemical interconversion of the 6H-benzofuro[3,2-c]benzopyrans and the related isoflavonoids is suggested.