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Chemoselective semihydrogenation of alkynes catalyzed by manganese(i)-PNP pincer complexes

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Abstract

A general manganese catalyzed chemoselective semihydrogenation of alkynes to olefins in the presence of molecular hydrogen is described. The best results are obtained by applying the aliphatic Mn PNP pincer complex Mn-3c which allows the transformation of various substituted internal alkynes to the respective Z-olefins under mild conditions and in high yields. Mechanistic investigations based on experiments and computations indicate the formation of the Z-isomer via an outer-sphere mechanism.

Graphical abstract: Chemoselective semihydrogenation of alkynes catalyzed by manganese(i)-PNP pincer complexes

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Article information


Submitted
14 May 2020
Accepted
21 May 2020
First published
22 May 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Chemoselective semihydrogenation of alkynes catalyzed by manganese(I)-PNP pincer complexes

M. Garbe, S. Budweg, V. Papa, Z. Wei, H. Hornke, S. Bachmann, M. Scalone, A. Spannenberg, H. Jiao, K. Junge and M. Beller, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY00992J

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