C-Sulfonylation of 4-Alkylpyridines: Formal Picolyl C–H Activation via Alkylidene Dihydropyridine Intermediates
作者:Soe L. Tun、Grant N. Shivers、F. Christopher Pigge
DOI:10.1021/acs.joc.3c00017
日期:2023.3.17
4-Picoline derivatives are converted to the corresponding aryl picolyl sulfones upon treatment with aryl sulfonyl chlorides and Et3N in the presence of catalytic DMAP. The reaction proceeds smoothly for a variety of alkyl and aryl picolines using a range of aryl sulfonyl chlorides. The reaction is believed to involve N-sulfonyl 4-alkylidene dihydropyridine intermediates and results in formal sulfonylation
在催化 DMAP 存在的情况下,用芳基磺酰氯和 Et 3 N处理后,4-甲基吡啶衍生物会转化为相应的芳基甲基吡啶砜。使用一系列芳基磺酰氯,各种烷基和芳基甲基吡啶的反应顺利进行。据信该反应涉及N-磺酰基 4-亚烷基二氢吡啶中间体,并导致未活化的甲基吡啶 C-H 键的形式磺酰化。