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)-centered radicals to highly strained bicyclo1.1.0butanes. The mild photoredox conditions, which make use of a readily available and bench stable phenyl sulfonyl bicyclo1.1.0butane, proved to be amenable to a diverse range of α-amino and α-oxy carboxylic acids, providing a concise route to 1,3-disubstituted cyclobutanes. Furthermore, kinetic studies and DFT calculations unveiled mechanistic details on bicyclo1.1.0butane reactivity relative to the corresponding olefin system.
Ernouf et al. (Wed,) studied this question.