Synlett 2024; 35(07): 741-746
DOI: 10.1055/a-2127-1305
synpacts

Synthesis of P-Chiral Tertiary Phosphine Oxides by Copper-Catalyzed Dynamic Kinetic Asymmetric C–P Cross-Coupling

Jie Kang
,
Simu Ren
,
Bo Su
The research was supported by the National Natural Science Foundation of China (22271161, 22188101), the Fundamental Research Funds for the Central Universities (735-63223065, 735-63233165), and Nankai University.


Abstract

P-Stereogenic phosphorus compounds are of importance in various areas. Some strategies have been developed for the enantioselective formation of C–P bonds, among which transition-metal-catalyzed asymmetric C–P cross-coupling of secondary phosphine oxides (SPOs)—bench-stable, odorless, and nontoxic—is more appealing. Due to the elusive racemization of SPOs, reactions with them usually proceed in a kinetic resolution fashion, thus being less practical. Highlighted here is a copper-catalyzed, highly enantioselective dynamic kinetic intermolecular C–P coupling of SPOs and aryl iodides. The successful development of this reaction relies on two key factors: the facile racemization of SPOs under the reaction conditions and the high enantioselectivity of the carefully tuned copper catalysts. P-Stereogenic tertiary phosphine oxide (TPO) products were obtained in high yields and with good enantioselectivities and were further converted into structurally diverse P-chiral scaffolds that are highly valuable as ligands and catalysts in asymmetric synthesis.



Publication History

Received: 28 June 2023

Accepted after revision: 11 July 2023

Accepted Manuscript online:
11 July 2023

Article published online:
05 September 2023

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