作者:Yoshitaka Nakamura、Anthony M. Burke、Shunsuke Kotani、Joseph W. Ziller、Scott D. Rychnovsky
DOI:10.1021/ol902389e
日期:2010.1.1
Lycoperine A was synthesized through a highly convergent route in which a double alkylation of 2,6-dicyano-N-benzylpiperidine with the octahydroquinoline moiety gave the lycoperine skeleton. The octahydroquinoline was prepared by a desymmetrization reaction of 5-methylcyclohexane-1,3-dione. Hydrolysis, reductive amination, and cyclization gave lycoperine A in 13 steps and 3% overall yield. The absolute configuration of lycoperine A was assigned as 6R,6'R,8R,8'R,13S,17R.
Synthesis of (±)-7-Hydroxylycopodine
作者:Hong-Yu Lin、Robert Causey、Gregory E. Garcia、Barry B. Snider
DOI:10.1021/jo300353t
日期:2012.9.7
unsuccessful attempts to make optically pure starting material, we observed the selective Pt-catalyzed hydrogenation of the 5-phenyl group of a 4,5-diphenyloxazolidine under acidic conditions and the Pt-catalyzed isomerization of the oxazolidine to an amide under neutral conditions. In attempts to hydroxylate the starting material so that we could adapt this synthesis to the preparation of (±)-7,8-dihydroxylycopodine