Isolation and structure of magnosalin and magnoshinin, new neolignans from Magnolia saliciforia Maxim.
摘要:
The structures of magnosalin and magnoshinin, new neolignans isolated from buds of Magnolia salicifolia MAXIM., were determined to be 1 and 4, respectively, on the basis of chemical and spectroscopic evidence.
A late-stage oxidative functionalization using DDQ and subsequent chemoselective oxidative demethylation enables the synthesis of (−)-magnoshinin and (+)-merrilliaquinone.