A Borane-Catalyzed Metal-Free Hydrosilylation of Chromones and Flavones

Xiaoyu Ren, Caifang Han, Xiangqing Feng, Haifeng Du*

*Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of China, Email: haifengduiccas.ac.cn

X. Ren, C. Han, X. Feng, H. Du, Synlett, 2017, 28, 2421-2424.

DOI: 10.1055/s-0036-1588474

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Abstract

A borane catalyst generated in situ by hydroboration of pentafluorostyrene with HB(C₆F₅)₂ enables a Piers-type hydrosilylation of chromones and flavones to afford a variety of chromanones and flavanones in very good yields.

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Key Words

hydrosilylation, silanes, chromones, flavones, chromanones, flavanones, borane catalyst, alkene, chiral diyne

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ID: J60-Y2017