The Need for an Alternative to Radicals as the Cause of Fragmentation of a Thiamin-Derived Breslow Intermediate
作者:Michael Bielecki、Ronald Kluger
DOI:10.1002/anie.201702240
日期:2017.5.22
(1) is a conjugate of benzoylformate and thiamin that loses CO2 to form the classic Breslow intermediate (2), whose expected fate is formation of the thiamin conjugate of benzaldehyde (3). Surprisingly, it was observed that 2 decomposes to 4 and 5 and rearranges to 6 in competition with the expected protonation to give 3. Recent reports propose that the alternatives to protonation arise from homolysis