a new desulfurative method for generating primary, secondary, and tertiary alkyl radicals through visible‐light photoredoxcatalysis. A process that involves the generation of N‐centered radicalsfrom sulfinamide intermediates, followed by subsequent fragmentation, is critical to forming the corresponding alkyl radical species. This strategy has been successfully applied to conjugate addition reactions
A Three-Component Derivatization Protocol for Determining the Enantiopurity of Sulfinamides by <sup>1</sup>H and <sup>19</sup>F NMR Spectroscopy
作者:Robin R. Groleau、Robert S. L. Chapman、Harry Ley-Smith、Liyuan Liu、Tony D. James、Steven D. Bull
DOI:10.1021/acs.joc.9b02473
日期:2020.1.17
A practically simple three-component chiralderivatizationprotocol has been developed to determine the enantiopurity of eight S-chiral sulfinamides by 1H and 19FNMRspectroscopicanalysis, based on their treatment with a 2-formylphenylboronic acid template and enantiopure pinanediol to afford a mixture of diastereomeric sulfiniminoboronate esters whose diastereomeric ratio is an accurate reflection
regiospecific alkyl addition reaction of (hetero)arene-fused thiophenes has been developed, employing bench-stable N-benzoyl alkyl-sulfinamides as the alkyl sources. This protocol offers a unique desulfuration approach to generate alkyl radicals that proceeds via nitrogen-centered radical intermediates.
Hydroxylamine‐Derived Reagent as a Dual Oxidant and Amino Group Donor for the Iron‐Catalyzed Preparation of Unprotected Sulfinamides from Thiols
作者:Sayanti Chatterjee、Szabolcs Makai、Bill Morandi
DOI:10.1002/anie.202011138
日期:2021.1.11
An iron catalyzed reaction for the selective transformation of thiols (‐SH) to sulfinamides (‐SONH2) by a direct transfer of ‐O and free ‐NH2 groups has been developed. The reaction operates undermildconditions using a bench stable hydroxylamine derived reagent, exhibits broad functional group tolerance, is scalable and proceeds without the use of any precious metal catalyst or additional oxidant