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- W4244843427 abstract "Abstract Mandelylthiamin ( 1 ) is a conjugate of benzoylformate and thiamin that loses CO 2 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 followed by radical‐centered processes. It is now found, instead, that the spectroscopic observations cited in support of the proposed radical pathways are likely to be the result of other events. An alternative explanation is that ionization of the enolic hydroxy group of 2 and resultant electronic reorganization leads to C−C bond cleavage and non‐radical intermediates that readily form 4 , 5 , and 6 ." @default.
- W4244843427 created "2022-05-12" @default.
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- W4244843427 date "2017-04-28" @default.
- W4244843427 modified "2023-09-26" @default.
- W4244843427 title "The Need for an Alternative to Radicals as the Cause of Fragmentation of a Thiamin‐Derived Breslow Intermediate" @default.
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- W4244843427 doi "https://doi.org/10.1002/ange.201702240" @default.
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