Whyte A, Bajohr J, Arora R, Torelli A, Lautens M. Sequential Pd
0 - and Pd
II -Catalyzed Cyclizations: Enantioselective Heck and Nucleopalladation Reactions.
Angew Chem Int Ed Engl 2021;
60:20231-20236. [PMID:
34240542 DOI:
10.1002/anie.202106518]
[Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/29/2021] [Indexed: 12/18/2022]
Abstract
An enantioselective consecutive cyclization/coupling process, catalyzed by palladium is reported. Stereoinduction arises from an enantioselective carbopalladation, generating an intermediate which promotes a nucleopalladation step. The dual cyclization sequence was compatible with a variety of alkyne-tethered oxygen- and nitrogen-centered nucleophiles, and a variety of alkenyl-tethered aryl iodides, to forge numerous bisheterocycles in good yields and high regio- and enantioselectivities.
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