Baker, Sarah I. published the artcileEnhanced Reactivity for Aromatic Bromination via Halogen Bonding with Lactic Acid Derivatives, Name: 4-(5-(p-Tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide, the publication is Journal of Organic Chemistry (2022), 87(13), 8492-8502, database is CAplus and MEDLINE.
Herein, a new method for regioselective aromatic bromination using lactic acid derivatives as halogen bond acceptors with N-bromosuccinimide (NBS) is reported. Several structural analogs of lactic acid affected the efficiency of aromatic brominations, presumably via Lewis acid/base halogen-bonding interactions. Rate comparisons of aromatic brominations demonstrated the reactivity enhancement available via catalytic additives capable of halogen bonding. Computational results demonstrated that Lewis basic additives interact with NBS to increase the electropos. character of bromine prior to electrophilic transfer. An optimized procedure using catalytic mandelic acid under aqueous conditions at room temperature has been developed to promote aromatic bromination on a variety of arene substrates with complete regioselectivity.
Journal of Organic Chemistry published new progress about 169590-42-5. 169590-42-5 belongs to amides-buliding-blocks, auxiliary class Sulfamide,Immunology/Inflammation,COX, name is 4-(5-(p-Tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide, and the molecular formula is C17H14F3N3O2S, Name: 4-(5-(p-Tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide.
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