New Insights into Cyclobutenone Rearrangements: A Total Synthesis of the Natural ROS-Generating Anti-Cancer Agent Cribrostatin 6
作者:Mubina Mohamed、Théo P. Gonçalves、Richard J. Whitby、Helen F. Sneddon、David C. Harrowven
DOI:10.1002/chem.201102263
日期:2011.12.2
Aryl‐ and heteroarylcyclobutenone rearrangements proceed in excellent yield under continuous‐flow conditions. The former shows a Hammett correlation with σI providing strong evidence that electrocyclisation is the rate‐determining step and has a late transition state. The reaction has been modelled by using DFT and CCSD(T) methods, with the latter giving excellent correlation with the experimental
在连续流动条件下,芳基和杂芳基环丁烯酮重排反应的产率很高。前者显示了一个哈米特相关σ我提供了强有力的证据表明,electrocyclisation是限速步骤,具有后过渡状态。已使用DFT和CCSD(T)方法对反应进行了建模,后者与实验速率常数具有极好的相关性。cribrostatin 6(一种抗肿瘤和抗微生物剂)的短而有效的全合成,可以局部证明这种方法的价值。