Total Syntheses of (−)-Lycoricidine, (+)-Lycoricidine, and (+)-Narciclasine via 6-<i>exo</i> Cyclizations of Substituted Vinyl Radicals with Oxime Ethers
作者:Gary E. Keck、Travis T. Wager、J. Felix Duarte Rodriquez
DOI:10.1021/ja9826688
日期:1999.6.1
The development of an approach to the totalsynthesis of the title alkaloids is described. The approach utilizes as the key strategic element a stereoselective 6-exo radical cyclization of a vinyl radical to an O-benzyloxime radical acceptor group. The vinyl radical was itself generated by regioselective addition of phenylthiyl radical to a disubstituted alkyne. The regiochemical issues of such additions