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Photoredox-Catalyzed Preparation of Sulfones Using Bis-Piperidine Sulfur Dioxide - An Underutilized Reagent for SO2 Transfer.

Published version
Peer-reviewed

Repository DOI


Change log

Authors

Griffiths, Oliver M  ORCID logo  https://orcid.org/0000-0003-3954-9343
Esteves, Henrique A  ORCID logo  https://orcid.org/0000-0001-6932-9005
Emmet, Darcy C 

Abstract

Sulfonyl groups are widely observed in biologically relevant molecules and consequently, SO2 capture is an increasingly attractive method to prepare these sulfonyl-containing compounds given the range of SO2 -surrogates now available as alternatives to using the neat gas. This, along with the advent of photoredox catalysis, has enabled mild radical capture of SO2 to emerge as an effective route to sulfonyl compounds. Here we report a photoredox-catalyzed cross-electrophile sulfonylation of aryl and alkyl bromides making use of a previously under-used amine-SO2 surrogate; bis(piperidine) sulfur dioxide (PIPSO). A broad selection of alkyl and aryl bromides were photocatalytically converted to their corresponding sulfinates and then trapped with various electrophiles in a one-pot multistep procedure to prepare sulfones and sulfonamides.

Description

Publication status: Published

Keywords

SO2 surrogate, photoredox catalysis, sulfinates, sulfonamides, sulfones

Journal Title

Chemistry

Conference Name

Journal ISSN

0947-6539
1521-3765

Volume Title

Publisher

Wiley
Sponsorship
Engineering and Physical Sciences Research Council (2276992)
Engineering and Physical Sciences Research Council (EP/S024220/1)