Bioinspired Total Synthesis of (±)-Yezo’otogirin C
摘要:
The first and protective group-free total synthesis of (+/-)-yezo'otogirin C has been achieved from 3-methyl-4-prenylcyclohex-2-enone in eight steps with 23% overall yield. The tricyclic core of (+/-)-yezo'otogirin C was established via a bioinspired oxidative cascade cyclization strategy using Mn(II)/Mn(III) and O-2, followed by reduction of the peroxy-bridged intermediate using thiourea in refluxing methanol.
Systemic Study on the Biogenic Pathways of Yezo’otogirins: Total Synthesis and Antitumor Activities of (±)-Yezo’otogirin C and Its Structural Analogues
摘要:
A systematic study of the biomimetic pathways to yezo'otogirin C under aerobic and anaerobic conditions has been investigated, and both are found to be feasible pathways to the natural product depending on the physiological conditions. Because of the lower activation energy, the aerobic process would be more favorable when the in vivo oxygen level is high. In the course of this study, a highly efficient synthetic route to (+/-)-yezo'otogirin C has been established in four steps (31% overall yield) from a readily available compound without using any protecting groups. The natural product and its structural analogues exhibited antitumor activities against several human cancer cell lines and appeared to arrest cell cycles in different phases.
Bioinspired Total Synthesis of (±)-Yezo’otogirin C
作者:Shuzhong He、Wei Yang、Lizhi Zhu、Guangyan Du、Chi-Sing Lee
DOI:10.1021/ol403374h
日期:2014.1.17
The first and protective group-free total synthesis of (+/-)-yezo'otogirin C has been achieved from 3-methyl-4-prenylcyclohex-2-enone in eight steps with 23% overall yield. The tricyclic core of (+/-)-yezo'otogirin C was established via a bioinspired oxidative cascade cyclization strategy using Mn(II)/Mn(III) and O-2, followed by reduction of the peroxy-bridged intermediate using thiourea in refluxing methanol.
Systemic Study on the Biogenic Pathways of Yezo’otogirins: Total Synthesis and Antitumor Activities of (±)-Yezo’otogirin C and Its Structural Analogues
作者:Wei Yang、Jingming Cao、Mengxun Zhang、Rongfeng Lan、Lizhi Zhu、Guangyan Du、Shuzhong He、Chi-Sing Lee
DOI:10.1021/jo502267g
日期:2015.1.16
A systematic study of the biomimetic pathways to yezo'otogirin C under aerobic and anaerobic conditions has been investigated, and both are found to be feasible pathways to the natural product depending on the physiological conditions. Because of the lower activation energy, the aerobic process would be more favorable when the in vivo oxygen level is high. In the course of this study, a highly efficient synthetic route to (+/-)-yezo'otogirin C has been established in four steps (31% overall yield) from a readily available compound without using any protecting groups. The natural product and its structural analogues exhibited antitumor activities against several human cancer cell lines and appeared to arrest cell cycles in different phases.