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。