Double Hydroboration of Quinolines
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Borane Catalysis: Diastereoselective One Pot Synthesis of 3‐Hydroxytetrahydroquinolines
作者:Eunae Kim、Hyun Ji Jeon、Sehoon Park、Sukbok Chang
DOI:10.1002/adsc.201901050
日期:2020.1.23
Described herein is an organoborane‐catalysed consecutive borylative reduction of quinolines and isoquinolines to furnish tetrahydro(iso)quinolines bearing a C(sp3)−B bond β to the nitrogen atom. The installed C−B bond is oxidatively transformed to the hydroxy group in one pot. The present double hydroboration is proposed to proceed via a stepwise ionic mechanism involving a boronium ion. The stereo‐outcome
本文描述的是喹啉和异喹啉的有机硼烷催化连续的硼基还原反应,以提供一个带有一个连接至氮原子的C(sp 3)-B键β的四氢(异)喹啉。一锅中安装的CB键被氧化转化为羟基。提出本双硼氢化反应是通过涉及硼离子的逐步离子机理进行的。发现立体结果取决于喹啉中取代基的位置(C2 vs C4)。