Synthesis of hexa-O-methyl-cupressuflavone and -agathisflavone
Abstract
Syntheses of hexa-O-methyl-cupressuflavone (1) and -agathisflavone (7)(4′,4‴,5,5″,7,7″-hexamethoxy-8,8″-biflavone and -6,8″-biflavone, respectively) are described starting from 3,3′-diacetyl-2,2′-dihydroxy-4,4′,6,6′-tetramethoxybiphenyl (9) and 3,3′-diacetyl-2,4′-dihydroxy-2′,4,6,6′-tetramethoxybiphenyl (8) respectively.