A novel asymmetric dimerization of cinnamic acid derivative was achieved in high efficiency
and high stereoselectivity. By using the reaction as a key step, two furofuran lignans,
yangambin and caruilignan A were synthesized in optically pure form in only 5 and
6 steps, respectively.
asymmetric synthesis - oxidative dimerization - furofuran lignan - yangambin - caruilignan