Unified Total Syntheses of Fawcettimine Class Alkaloids: Fawcettimine, Fawcettidine, Lycoflexine, and Lycoposerramine B
作者:Guojun Pan、Robert M. Williams
DOI:10.1021/jo3006045
日期:2012.5.18
syntheses of the lycopodiumalkaloids fawcettimine, fawcettidine, lycoflexine, and lycoposerramine B have been accomplished through an efficient, unified, and stereocontrolled strategy that relies on a Diels–Alder reaction to construct the cis-fused 6,5-carbocycles with one all-carbon quaternary center. Access to the enantioselective syntheses of both antipodes of those alkaloids can be achieved by
Total Syntheses of Lycopodium Alkaloids (+)-Fawcettimine, (+)-Fawcettidine, and (−)-8-Deoxyserratinine
作者:Houhua Li、Xiaoming Wang、Xiaoguang Lei
DOI:10.1002/anie.201106753
日期:2012.1.9
A shared story: Three fawcettimine‐ and serratinine‐type Lycopodiumalkaloids are prepared from a common tetracyclic spirodiketone intermediate in concise total syntheses (see scheme). The intermediate was constructed by a remarkable biosynthesis‐inspired transannular NC bond formation to the spiro‐configured carbon center and a hydroxy‐directed pinacol coupling promoted by SmI2.
Collective Synthesis of <i>Lycopodium</i> Alkaloids and Tautomer Locking Strategy for the Total Synthesis of (−)-Lycojapodine A
作者:Houhua Li、Xiaoming Wang、Benke Hong、Xiaoguang Lei
DOI:10.1021/jo3017555
日期:2013.2.1
The collective totalsynthesis of Lycopodium alkaloids (+)-fawcettimine (1), (+)-fawcettidine (2), (+)-alopecuridine (4), (−)-lycojapodine A (6), and (−)-8-deoxyserratinine (7) has been accomplished from a common precursor (15) based on a highly concise route inspired by the proposed biosynthesis of the fawcettimine- and serratinine-type alkaloids. An intramolecular C-alkylation enabled efficient installation
Enantioselective divergent total syntheses of fawcettimine-type Lycopodium alkaloids
作者:Chen Zeng、Jingyun Zhao、Gang Zhao
DOI:10.1016/j.tet.2014.11.041
日期:2015.1
Enantioselective divergent total syntheses of (+)-fawcettimine, (+)-fawcettidine, (+)-lycoflexine, (+)-lycoposerramine Q, (−)-Huperzine Q and (+)-N-oxyhuperzine Q have been described from a common precursor. The syntheses feature a vinylogous Rubottom oxidation and several biomimetic transformations.
Divergent Total Syntheses of (−)-Lycopladine D, (+)-Fawcettidine, and (+)-Lycoposerramine Q
作者:Chen Zeng、Changwu Zheng、Jingyun Zhao、Gang Zhao
DOI:10.1021/ol402906y
日期:2013.11.15
Enantioselective total syntheses of (+)-fawcettidine and (+)-lycoposerramine Q as well as the first totalsynthesis of (−)-lycopladine D from a common intermediate have been accomplished by a divergent path. The common intermediate was derived from a Hajos–Parrish-like diketone by a stereoselective Birch reduction and a Suzuki coupling. The synthesis of (−)-lycopladine D featured an allylic oxidation