銅（I）-ホスフィン錯体触媒を用いた有機ホウ素化合物の選択的合成法

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  • Selective Synthesis of Organoboron Compounds with Copper(I)-Phosphine Complex Catalysts
  • ドウ(I)- ホスフィン サクタイ ショクバイ オ モチイタ ユウキ ホウソ カゴウブツ ノ センタクテキ ゴウセイホウ

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Transition-metal-catalyzed borylation has emerged as a powerful method for preparation of organoboron compounds, which are useful synthetic reagents in organic synthesis. However, chemo-, regio-, and stereoselective synthesis of the boron compounds are still highly required.<br>Herein, we report copper(I)-catalyzed boryl substitution of allylic carbonates and ethers, monoborylation of 1,3-dienes and enynes, boryl substitution of alkyl halides, and borylative cyclization of alkenes containing an appropriate leaving group for the selective synthesis of various organoboron compounds including allyl- and allenylboronates, and optically active carbocyclic boronates. Preparation of the borylation products has been difficult with known procedures. In addition, direct enantio-convergent transformation of racemic substrates without a racemization or symmetrization process, a novel methodology for asymmetric synthesis with racemic substrates, is also reported.

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