Asr. Anjaneyulu et Ds. Kumar, SYNTHETIC EXPERIMENTS IN LIGNANS .16. OXIDATIVE DIMERIZATION OF M-HYDROXYCINNAMIC ACID WITH PHOSPHOMOLYBDIC ACID ON SILICA-GEL SUPPORT, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 35(10), 1996, pp. 1038-1042
m-Hydroxycinnamic acid 7a or its methyl ester 7b has been subjected to
phenolic oxidative coupling with phosphomolybdic acid on silica gel s
upport leading to the formation of aryl-aryl coupled dimers 9 and 10,
respectively which form the precursors for the synthesis of dibenzocyc
looctadiene lignans.