Synthesis of aminoarylboronic esters and substituted anilines from arenes via catalytic C-H activation/borylation/amination and uses thereof
申请人:Board of Trustees of Michigan State University
公开号:US20040024237A1
公开(公告)日:2004-02-05
A process is described for synthesizing aminoarylboronic esters of the general formula
1
wherein R, R
2
, and R
3
are each an alkyl, aryl, vinyl, alkoxy, carboxylic esters, amides, or halogen; Ar is any variety of phenyl, naphthyl, anthracyl, heteroaryl; and R
1
is alkyl, hydrogen, or aryl. The aminoarylboronic esters are produced via the metal-catalyzed coupling of arylboronic esters of the general formula
2
wherein R and R
1
are any non-interfering group and X is chloro, bromo, iodo, triflates, or nonaflates to amines (primary and secondary). In particular, a process is described for the synthesis of the aminoarylboronic esters via a step-wise or tandem process in which one catalytic event is a metal-catalyzed borylation and the other catalytic event is a metal-catalyzed amination.
描述了一种合成
氨基芳基
硼酸酯的过程,其一般公式为1,其中R、R2和R3分别为烷基、芳基、
乙烯基、烷氧基、
羧酸酯、酰胺或卤素;Ar为苯基、
萘基、
蒽基、杂环芳基的任何一种;R1为烷基、氢或芳基。
氨基芳基
硼酸酯是通过
金属催化偶联合成的,其一般公式为2,其中R和R1为任何非干扰基,X为
氯、
溴、
碘、
三氟甲烷基
磺酸酯或非
氟甲烷基
磺酸酯,与胺(一级和二级)发生偶联。具体来说,描述了一种通过逐步或串联过程合成
氨基芳基
硼酸酯的方法,其中一个催化事件是
金属催化的
硼化反应,另一个催化事件是
金属催化的胺化反应。