| Literature DB >> 30536546 |
Liang Hu1, Peng-Xiang Shen1, Qian Shao1, Kai Hong1, Jennifer X Qiao2, Jin-Quan Yu1.
Abstract
PdII -catalyzed enantioselective C(sp3 )-H cross-coupling of free carboxylic acids with organoborons has been realized using either mono-protected amino acid (MPAA) ligands or mono-protected aminoethyl amine (MPAAM) ligands. A diverse range of aryl- and vinyl-boron reagents can be used as coupling partners to provide chiral carboxylic acids. This reaction provides an alternative approach to the enantioselective synthesis of cyclopropanecarboxylic acids and cyclobutanecarboxylic acids containing α-chiral tertiary and quaternary stereocenters. The utility of this reaction was further demonstrated by converting the carboxylic acid into cyclopropyl amine without loss of optical activity.Entities:
Keywords: C−H activation; arylation; palladium; vinylation
Year: 2019 PMID: 30536546 PMCID: PMC6641982 DOI: 10.1002/anie.201813055
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336