Enantioselective palladium-catalyzed C(sp2)-H carbamoylation
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Add time:08/13/2019 Source:sciencedirect.com
An enantioselective palladium-catalyzed C(sp2)-H carbamoylation for the preparation of chiral isoindolines was described for the first time. With chiral monophosphorus ligand (R)-AntPhos as the ligand, a series of chiral isoindolines were prepared from diarylmethyl carbamoyl chlorides in excellent yields and enantioselectivities with the palladium loading as low as 1 mol%. Initial mechanistic studies indicated the asymmetric cyclization catalyzed a palladium species with a single chiral monophosphorus ligand.
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