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. 2015 Apr 22;137(15):4924-7.
doi: 10.1021/jacs.5b01671. Epub 2015 Apr 9.

Direct Aerobic Carbonylation of C(sp²)-H and C(sp³)-H Bonds through Ni/Cu Synergistic Catalysis with DMF as the Carbonyl Source

Xuesong Wu  1 , Yan Zhao  1 , Haibo Ge  1
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Free article

Direct Aerobic Carbonylation of C(sp²)-H and C(sp³)-H Bonds through Ni/Cu Synergistic Catalysis with DMF as the Carbonyl Source

Xuesong Wu et al. J Am Chem Soc. .
Free article

Abstract

The direct carbonylation of aromatic sp(2) and unactivated sp(3) C-H bonds of amides was achieved via nickel/copper catalysis under atmospheric O2 with the assistance of a bidentate directing group. The sp(2) C-H functionalization showed high regioselectivity and good functional group compatibility. The sp(3) C-H functionalization showed high site-selectivity by favoring the C-H bonds of α-methyl groups over those of the α-methylene, β- or γ-methyl groups. Moreover, this reaction showed a predominant preference for functionalizing the α-methyl over α-phenyl group. Mechanistic studies revealed that nickel/copper synergistic catalysis is involved in this process.

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