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C-Sulfonylation of 4-Alkylpyridines: Formal Picolyl C-H Activation via Alkylidene Dihydropyridine Intermediates
Journal article   Open access   Peer reviewed

C-Sulfonylation of 4-Alkylpyridines: Formal Picolyl C-H Activation via Alkylidene Dihydropyridine Intermediates

Soe L Tun, Grant N Shivers and F Christopher Pigge
Journal of organic chemistry, Vol.88(6), pp.3998-4002
03/17/2023
DOI: 10.1021/acs.joc.3c00017
PMCID: PMC10028608
PMID: 36848377
url
https://doi.org/10.1021/acs.joc.3c00017View
Published (Version of record) Open Access

Abstract

4-Picoline derivatives are converted to the corresponding aryl picolyl sulfones upon treatment with aryl sulfonyl chlorides and Et N 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 -sulfonyl 4-alkylidene dihydropyridine intermediates and results in formal sulfonylation of unactivated picolyl C-H bonds.
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