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Radical Carbonyl Umpolung Arylation via Dual Nickel Catalysis

Authors :
Huan-Ming Huang
Peter Bellotti
Johannes E. Erchinger
Tiffany O. Paulisch
Frank Glorius
Source :
Journal of the American Chemical Society. 144:1899-1909
Publication Year :
2022
Publisher :
American Chemical Society (ACS), 2022.

Abstract

The formation of carbon-carbon bonds lies at the heart of synthetic organic chemistry and is widely applied to construct complex drugs, polymers, and materials. Despite its importance, catalytic carbonyl arylation remains comparatively underdeveloped, due to limited scope and functional group tolerance. Herein we disclose an umpolung strategy to achieve radical carbonyl arylation via dual catalysis. This redox-neutral approach provides a complementary method to construct Grignard-type products from (hetero)aryl bromides and aliphatic aldehydes, without the need for pre-functionalization. A sequential activation, hydrogen-atom transfer, and halogen atom transfer process could directly convert aldehydes to the corresponding ketyl-type radicals, which further react with aryl-nickel intermediates in an overall polarity-reversal process. This radical strategy tolerates─among others─acidic functional groups, heteroaryl motifs, and sterically hindered substrates and has been applied in the late-stage modification of drugs and natural products.

Details

ISSN :
15205126 and 00027863
Volume :
144
Database :
OpenAIRE
Journal :
Journal of the American Chemical Society
Accession number :
edsair.doi.dedup.....868f6c82fbc8699001ac44f448302bf9