A stereospecific synthesis of the biologically active compound (+)-CP-99,994 was achieved. The key step in this process was a ring-expansion rearrangement, in which threo-fused monosubstituted prol...
Catalytic Asymmetric Synthesis of Piperidines from Pyrrolidine: Concise Synthesis of L-733,060
作者:Julia L. Bilke、Stephen P. Moore、Peter O’Brien、John Gilday
DOI:10.1021/ol900366m
日期:2009.5.7
Catalytic asymmetric deprotonation-aldehyde trapping-ring expansion from a 5- to a 6-ring delivers a concise route to each stereoisomer of β-hydroxy piperidines starting from N-Boc pyrrolidine. The methodology is utilized in a 5-step catalytic asymmetricsynthesis of the neorokinin-1 receptor antagonist, (+)-L-733,060.