The Disappearing Director: The Case of Directed
<i>N</i>
‐Arylation
<i>via</i>
a Removable Hydroxyl Group
作者:Magdalena R. Andrzejewska、Prasanna K. Vuram、Narender Pottabathini、Venkateshwarlu Gurram、Siva Subrahmanyam Relangi、Kirill A. Korvinson、Raju Doddipalla、Lothar Stahl、Michelle C. Neary、Padmanava Pradhan、Somesh Sharma、Mahesh K. Lakshman
DOI:10.1002/adsc.201701611
日期:2018.7.4
N-arylation of benzotriazoles is reported. Copper-mediated reactions of diverse 1-hydroxy-1H-benzotriazoles with aryl boronic acids lead to 1-aryl-1H-benzotriazole 3-oxides. A N1-OH → N3 prototropy in the 1-hydroxy-1H-benzotriazoles is plausibly the underlying basis, where the tautomer is captured by the boronic acid, leading to C-N (not C-O) bond formation. Because the N-O bond in amine N-oxides and 1-hyd
报道了一种简便且广泛适用的苯并三唑区域特异性 N-芳基化方法。铜介导的多种 1-羟基-1H-苯并三唑与芳基硼酸的反应产生 1-芳基-1H-苯并三唑 3-氧化物。1-羟基-1H-苯并三唑中的 N1-OH → N3 质子性可能是潜在的基础,其中互变异构体被硼酸捕获,导致 CN(而不是 CO)键的形成。由于胺 N-氧化物和 1-羟基-1H-苯并三唑中的 NO 键很容易被二硼试剂(例如 (pinB)2 和 B2(OH)4)还原,因此 1-芳基-1H-苯并三唑 3-氧化物的暴露然后,B2(OH)4 会导致 NO 键轻松还原,从而产生多种区域特异性芳基化苯并三唑。因此,1-羟基-1H-苯并三唑中的 N-羟基充当一次性芳基化导向剂。