Asymmetric total synthesis of sperabillins B and D via lithium amide conjugate addition
作者:Stephen G. Davies、Jane R. Haggitt、Osamu Ichihara、Richard J. Kelly、Michael A. Leech、Anne J. Price Mortimer、Paul M. Roberts、Andrew D. Smith
DOI:10.1039/b404962d
日期:——
Diastereoselective conjugateaddition of homochiral lithium (R)-N-allyl-N-alpha-methylbenzylamide to methyl (2E,5E)-hepatadienoate, followed by protecting group manipulation and subsequent iodocyclocarbamation allows a concise route to the core fragment, methyl (3R,5R,6R)-3,6-diamino-5-hydroxyheptanoate, of sperabillins B and D. Differentiation between the C-3 and C-6 primary amino groups of this core