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铜催化1,3 - 丁二烯硼酸酯与酰氟的不对称酰基硼化反应

Copper-Catalyzed Asymmetric Acylboration of 1,3-Butadienylboronate with Acyl Fluorides.

作者信息

Gao Shang, Liu Jiaming, Troya Diego, Chen Ming

机构信息

Department of Chemistry and Biochemistry, Auburn University, 36849, Auburn, AL, USA.

Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 210009, Nanjing, China.

出版信息

Angew Chem Int Ed Engl. 2023 Oct 23;62(43):e202304796. doi: 10.1002/anie.202304796. Epub 2023 Sep 15.

Abstract

We report herein a Cu-catalyzed regio-, diastereo- and enantioselective acylboration of 1,3-butadienylboronate with acyl fluorides. Under the developed conditions, the reactions provide (Z)-β,γ-unsaturated ketones bearing an α-tertiary stereocenter with high Z-selectivity and excellent enantioselectivities. While direct access to highly enantioenriched E-isomers was not successful, we showed that such molecules can be synthesized with excellent E-selectivity and optical purities via Pd-catalyzed alkene isomerization from the corresponding Z-isomers. The orthogonal chemical reactivities of the functional groups embedded in the ketone products allow for diverse chemoselective transformations, which provides a valuable platform for further derivatization.

摘要

我们在此报告了一种铜催化的1,3 - 丁二烯硼酸酯与酰氟的区域、非对映和对映选择性酰基硼化反应。在优化的反应条件下,该反应能以高Z选择性和优异的对映选择性得到带有α - 叔立体中心的(Z)-β,γ - 不饱和酮。虽然直接获得高对映体富集的E - 异构体未成功,但我们表明,通过钯催化相应Z - 异构体的烯烃异构化,可以以优异的E - 选择性和光学纯度合成此类分子。酮产物中嵌入的官能团的正交化学反应性允许进行多种化学选择性转化,这为进一步衍生化提供了一个有价值的平台。

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