Concise and Stereocontrolled Synthesis of the Tetracyclic Core of Daphniglaucin C
作者:Stephen Hanessian、Stéphane Dorich、Helge Menz
DOI:10.1021/ol4018112
日期:2013.8.16
The tetracycliccore of daphniglaucin C was prepared from the known 4-keto-N-Boc methyl-l-prolinate in 15 steps with a cumulative yield of 14.7%. The key steps toward this core motif feature a reductive double bond transposition from an unactivated tertiary allylic alcohol, a Pd-catalyzed Stille coupling, and Dieckmann cyclizations.