One-Pot Borylation/Amination Reactions: Syntheses of Arylamine Boronate Esters from Halogenated Arenes
作者:Daniel Holmes、Ghayoor A. Chotana、Robert E. Maleczka,、Milton R. Smith
DOI:10.1021/ol060205y
日期:2006.3.1
text] A one-pot protocol for converting 1,3- and 1,4-substituted aryl halides to arylamine boronate esters is described. This is achieved by sequential Ir-catalyzed aromatic borylation at the least hindered C-H bond of the aryl halide and subsequent Pd-catalyzed C-N coupling at the halide position of the crude arylboronicester.
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.