Multicomponent Linchpin Coupling of Silyl Dithianes Employing an <i>N</i>-Ts Aziridine as the Second Electrophile: Synthesis of (−)-Indolizidine 223AB
作者:Amos B. Smith、Dae-Shik Kim
DOI:10.1021/ol049601b
日期:2004.4.1
[reaction: see text] An efficient, stereocontrolled assembly of the indolizidine alkaloid, (-)-indolizidine 223AB, exploiting a three-component linchpincoupling employing an N-Ts aziridine as the second electrophile, followed by a one-pot sequential construction of the indolizidine ring system, has been achieved. The longest linear sequence was 10 steps, proceeding in 10% overall yield.
A General, Convergent Strategy for the Construction of Indolizidine Alkaloids: Total Syntheses of (−)-Indolizidine 223AB and Alkaloid (−)-205B
作者:Amos B. Smith、Dae-Shik Kim
DOI:10.1021/jo052314g
日期:2006.3.31
alcohols. This tactic, in conjunction with a one-flask sequential cyclization, constitutes an effective general strategy for the construction of indolizidine and related alkaloids, illustrated here with the total syntheses of (−)-indolizidine 223AB (1) and alkaloid (−)-205B (2).