Aminocyanation by the Addition of N–CN Bonds to Arynes: Chemoselective Synthesis of 1,2-Bifunctional Aminobenzonitriles
摘要:
An efficient aminocyanation by the direct addition of aryl cyanamides to arynes is described, enabling incorporation of highly useful amino and cyano groups synchronously via cleavage of inert N-CN bonds, affording synthetically useful 1,2-bifunctional aminobenzonitriles. The postsynthetic functionalization of the aminocyanation products allows diverse formation of synthetically important derivatives such as drug molecule Ponstan and fused heterocycles.
novel palladium-catalyzed protocol for the synthesis of 9-arylacridines via tandem reaction of 2-(arylamino)benzonitrile with arylboronic acids in water has been developed with good functional group tolerance. The present synthetic route could be readily scaled up to gram quantity without difficulty. This methodology was further extended to the synthesis of a 4′-OH derivative, which showed estrogenic
Aminocyanation by the Addition of N–CN Bonds to Arynes: Chemoselective Synthesis of 1,2-Bifunctional Aminobenzonitriles
作者:Bin Rao、Xiaoming Zeng
DOI:10.1021/ol403346x
日期:2014.1.3
An efficient aminocyanation by the direct addition of aryl cyanamides to arynes is described, enabling incorporation of highly useful amino and cyano groups synchronously via cleavage of inert N-CN bonds, affording synthetically useful 1,2-bifunctional aminobenzonitriles. The postsynthetic functionalization of the aminocyanation products allows diverse formation of synthetically important derivatives such as drug molecule Ponstan and fused heterocycles.
A Copper-Catalyzed Tandem C-H <i>ortho</i>
-Hydroxylation and N-N Bond-Formation Transformation: Expedited Synthesis of 1-(<i>ortho</i>
-Hydroxyaryl)-1<i>H</i>
-indazoles
A Cu‐catalyzedC(sp2)–H ortho‐hydroxylation and N–N bond‐formationsequence is described for the synthesis of 1‐(ortho‐hydroxyaryl)‐1H‐indazoles by using pure oxygen as the terminal oxidant. The ortho‐arylamino N–H ketimine moiety serves as an effective directing group for C(sp2)–H oxidation. acac = acetylacetonate.