A 7-Step Formal Asymmetric Total Synthesis of Strictamine via an Asymmetric Propargylation and Metal-Mediated Cyclization
作者:Myles W. Smith、Zhiyao Zhou、Alison X. Gao、Takuya Shimbayashi、Scott A. Snyder
DOI:10.1021/acs.orglett.6b03839
日期:2017.3.3
how a novel catalytic asymmetric propargylation of 3,4-dihydro-β-carboline, followed by a designed Au(I)/Ag(I)-mediated 6-endo-dig cyclization, can directly deliver the indolenine-fused methanoquinolizidine core of the akuammiline alkaloid strictamine in its native oxidation state, ultimately achieving a 7-step formal asymmetric total synthesis. Also demonstrated are how the cyclization products can
此处显示了3,4-二氢-β-咔啉的新型催化不对称炔丙基化,然后设计的Au(I)/ Ag(I)介导的6-内切环化,如何直接递送吲哚肾上腺素稠合的甲喹喹嗪akuammiline生物碱strictamine的核心处于其天然氧化态,最终实现了7步形式的不对称全合成。还证明了环化产物如何能重排成长春碱型骨架,并进一步用于脱羰甲氧基二氢甘比南宁的第一个催化不对称全合成的发达的炔丙基化反应。