Synthesis 2022; 54(09): 2205-2212
DOI: 10.1055/a-1709-3426
paper

Chemoselective Reduction of Tertiary Amides by 1,3-Diphenyl­disiloxane (DPDS)

Travis A. Hammerstad
a   Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA
,
Pooja V. Hegde
b   Department of Medicinal Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA
,
Kathleen J. Wang
a   Department of Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA
,
b   Department of Medicinal Chemistry, University of Minnesota Twin Cities, Minneapolis, Minnesota 55455, USA
› Author Affiliations


Abstract

A convenient procedure for the chemoselective reduction of tertiary amides at room temperature in the presence of air and moisture using 1,3-diphenyldisiloxane (DPDS) is developed. The reaction conditions tolerate a significant number of functional groups including esters, nitriles, secondary amides, carbamates, sulfoxides, sulfones, sulfonyl fluorides, halogens, aryl-nitro groups, and arylamines. The conditions reported are the mildest to date and utilize EtOAc, a preferred solvent given its excellent safety profile and lower environmental impact. The ease of setup and broad chemoselectivity make this method attractive for organic synthesis, and the results further demonstrate the utility of DPDS as a selective reducing agent.

Supporting Information



Publication History

Received: 16 October 2021

Accepted after revision: 30 November 2021

Accepted Manuscript online:
30 November 2021

Article published online:
26 January 2022

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