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Direct C(sp2)-H alkylation of unactivated arenes enabled by photoinduced Pd catalysis.

Abstract：

:Despite the fundamental importance of efficient and selective synthesis of widely useful alkylarenes, the direct catalytic C(sp2)-H alkylation of unactivated arenes with a readily available alkyl halide remains elusive. Here, we report the catalytic C(sp2)-H alkylation reactions of unactivated arenes with alkyl bromides via visible-light induced Pd catalysis. The reaction proceeds smoothly under mild conditions without any skeletal rearrangement of the alkyl groups. The direct syntheses of structurally diverse linear and branched alkylarenes, including the late-stage phenylation of biologically active molecules and an orthogonal one-pot sequential Pd-catalyzed C-C bond-forming reaction, are achieved with exclusive chemoselectivity and exceptional functional group tolerance. Comprehensive mechanistic investigations through a combination of experimental and computational methods reveal a distinguishable Pd(0)/Pd(I) redox catalytic cycle and the origin of the counter-intuitive reactivity differences among alkyl halides.

journal_name

Nat Commun

journal_title

Nature communications

authors

Kim D,Lee GS,Kim D,Hong SH

doi

10.1038/s41467-020-19038-8

subject

Has Abstract

pub_date

2020-10-19 00:00:00

pages

5266

issue

1

issn

2041-1723

pii

10.1038/s41467-020-19038-8

journal_volume

11

pub_type

杂志文章

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