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