Enantioselective Copper-Catalyzed sp2/sp3Diborylation of 1-Chloro-1-Trifluoromethylalkenes

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Abstract

Fluorine-containing organoboron compounds have emerged as novel building blocks in chemical synthesis; among them, fluorinated sp2/sp3diborylated compounds are particularly appealing, since they might undergo chemoselective and diversified transformations of different C-B bonds with fluorinated functionality, thus bringing versatility and complexity to the eventual products. However, expedient, synthetic strategies for the construction of such fluorinated diborylative compounds are very sparse. Herein, we disclose enantioselective Cu-catalyzed sp2/sp3diborylations of 1-chloro-1-trifluoromethylalkenes, leading to diborylated compounds bearing a gem-difluoroalkenyl moiety; most intriguingly, the new formed C-B bonds include one stereoselective and optically pure Csp3-B bond. Further transformations on the eventual products demonstrated the values of our presented strategy.

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Fan, Z., Ye, M., Wang, Y., Qiu, J., Li, W., Ma, X., … Song, Q. (2022). Enantioselective Copper-Catalyzed sp2/sp3Diborylation of 1-Chloro-1-Trifluoromethylalkenes. ACS Central Science, 8(8), 1134–1144. https://doi.org/10.1021/acscentsci.2c00339

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