A synthetically convenient approach for the direct α-deuteration of amides is reported. This mechanistically unusual process relies on a retro-ene-type process, triggered by the addition of deuterated dimethyl sulfoxide to a keteniminium intermediate, generated through electrophilic amide activation. The transformation displays broad functional-group tolerance and high deuterium incorporation.
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http://dx.doi.org/10.1002/chem.202004103 | DOI Listing |
J Org Chem
February 2023
Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Republic of Korea.
An efficient chemoselective reduction of isatin derivatives using catalyst B(CF), benzyldimethylsilane, and HO is described. Notably, a small amount of water is shown to be a highly effective reaction promoter that decreases the reaction time and temperature for the synthesis of indolin-3-ones. Moreover, using method, excellent deuterium incorporation is achieved the catalytic α-deuteration of indolin-3-ones using B(CF) and DO.
View Article and Find Full Text PDFChemistry
December 2020
Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Vienna, Austria.
A synthetically convenient approach for the direct α-deuteration of amides is reported. This mechanistically unusual process relies on a retro-ene-type process, triggered by the addition of deuterated dimethyl sulfoxide to a keteniminium intermediate, generated through electrophilic amide activation. The transformation displays broad functional-group tolerance and high deuterium incorporation.
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