A 2,2′-binaphthyl-1,1′-quinone from Diospyros buxifolia

Abstract

The blue pigment obtained from the wood of D. buxifolia is 8,8′-dihydroxy-4,4′-dimethoxy-6,6′-di-methyl-2,2′-binaphthyl-1,1′-quinone (1; X = OH, Y = Me).