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Synlett 2019; 30(07): 845-850
DOI: 10.1055/s-0037-1611752
DOI: 10.1055/s-0037-1611752
letter
Asymmetric [3+2] Cycloaddition of Olefins with Morita–Baylis–Hillman Carbonates Catalyzed by BINOL-Based Bifunctional Phosphine
We are grateful for the support provided for this study by the National Natural Science Foundation of China (21502013, 21871035) and Chongqing University of Arts and Sciences (R2015BX01).Further Information
Publication History
Received: 15 January 2019
Accepted after revision: 08 February 2019
Publication Date:
06 March 2019 (online)


Abstract
We have developed a series of novel BINOL-based phosphines. These bifunctional organocatalysts can be used in the [3+2] cycloaddition of electron-deficient olefins and Morita–Baylis–Hillman (MBH) carbonates. Moderate to excellent yields (up to >99%) and good to excellent enantioselectivities (up to 95% ee) can be obtained in the cycloaddition reaction of maleimides and MBH carbonates. The application of these novel phosphines can be further extended to the asymmetric synthesis of chiral spirooxindoles (up to 85% ee). The results in this study indicate that the BINOL moiety plays an important role in stereocontrol.
Supporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0037-1611752.
- Supporting Information