Synthesis 2017; 49(05): 1024-1036
DOI: 10.1055/s-0036-1588894
paper
© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Direct α-Arylation of p-Methoxybenzyl-Protected S,S-Dimethylsulfoximine

Juan A. Sirvent
a   Bayer Pharma AG, Drug Discovery, Müllerstr. 178, 13353 Berlin, Germany   Email: ulrich.luecking@bayer.com
,
Donald Bierer
b   Bayer Pharma AG, Drug Discovery, Aprather Weg 18a, 42113 Wuppertal, Germany
,
Robert Webster
b   Bayer Pharma AG, Drug Discovery, Aprather Weg 18a, 42113 Wuppertal, Germany
,
Ulrich Lücking*
a   Bayer Pharma AG, Drug Discovery, Müllerstr. 178, 13353 Berlin, Germany   Email: ulrich.luecking@bayer.com
› Author Affiliations
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Publication History

Received: 28 July 2016

Accepted after revision: 12 September 2016

Publication Date:
12 October 2016 (online)


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Abstract

Sulfoximines have recently gained considerable recognition as an important structural motif in the life sciences. This is especially true for (hetero)aryl-substituted S,S-dimethylsulfoximine derivatives, such as the marketed insecticide sulfoxaflor, as well as the clinical candidates­ PTEFb inhibitor BAY 1143572 and ATR inhibitor AZD 6738 for the treatment of cancer. Herein, the first palladium-catalyzed direct α-arylation of p-methoxybenzyl-protected S,S-dimethylsulfoximine using readily available (hetero)aryl bromides is reported. This new method provides a safe, short, and efficient approach to (hetero)aryl-substituted­ S,S-dimethylsulfoximine derivatives, an important class of bioactive compounds, demonstrated by application of this methodology to an improved synthesis of PTEFb inhibitor BAY 1143572.

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