Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 62, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202214460
Keywords
Asymmetric Catalysis; C-H Activation; Counteranion; Rhodium Catalysis; Satoh-Miura Reaction
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Satoh-Miura reaction is an important method for extending pi-systems via C-H activation and alkynyl annulation. However, achieving high enantioselectivity remains challenging. In this study, an asymmetric Satoh-Miura reaction using a SCpRh-catalyst is reported, and it is found that choosing the counteranion of the catalyst is crucial for the desired reactivity.
Satoh-Miura reaction is an important method for extending pi-systems by forging multi-substituted benzene rings via double aryl C-H activation and annulation with alkynes. However, the development of highly enantioselective Satoh-Miura reaction remains rather challenging. Herein, we report an asymmetric Satoh-Miura reaction between 1-aryl benzo[h]isoquinolines and internal alkynes enabled by a SCpRh-catalyst. Judiciously choosing the counteranion of the Rh-catalyst is crucial for the desired reactivity over the competitive formation of azoniahelicenes. Detailed mechanistic studies support the proposal of counteranion-directed switching of reaction pathways in Rh-catalyzed asymmetric C-H activation.
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