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DOI: 10.1055/s-0040-1706295
Cs2CO3-Mediated Regio- and Stereoselective Sulfonylation of 1,1-Dibromo-1-alkenes with Sodium Sulfinates
We are thankful to Alzahra University and the Iran National Science Foundation (INSF) for the financial support.


This paper is dedicated to Professor Majid M. Heravi on the occasion of his 68th birthday.
Abstract
A highly selective synthesis of (Z)-1-bromo-1-sulfonyl alkenes via Cs2CO3-promoted sulfonylation of 1,1-dibromo-1-alkenes with sodium sulfinates is described. Notably, using excess amounts of Cs2CO3 and sodium sulfinate in such a reaction regenerated the parent aldehyde. Interestingly, the reaction of 1-(2,2-dibromovinyl)-2-nitrobenzene in the presence of sulfinates and Cs2CO3 produced isatin. The Sonogashira cross coupling of synthesized (Z)-1-bromo-1-sulfonyl alkenes with phenylacetylene gave selectively the corresponding sulfonylalkynyl alkenes.
Key words
1,1-dibromo-1-alkenes - sodium sulfonates - regioselective - vinyl sulfone - cesium carbonate - isatinSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0040-1706295.
- Supporting Information
Publikationsverlauf
Eingereicht: 10. Juli 2020
Angenommen nach Revision: 22. August 2020
Artikel online veröffentlicht:
06. Oktober 2020
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