Formal synthesis of the bisbenzylisoquinoline alkaloid berbamunine by asymmetric substitution of chiral organolithium compounds
作者:Bob Gawley、Robert E. Gawley、Gregory A. Smith
DOI:10.3998/ark.5550190.0012.514
日期:——
Asymmetric alkylation of enantiomeric tetrahydroisoquinolyl oxazolines was achieved with 96-97% diastereoselectivity. Removal of the oxazoline chiral auxiliary and further transformations provide a straightforward synthesis of the two synthetic intermediates that were previously synthesized by resolution, and which comprise a formalsynthesis of berbamunine by Ullman coupling.