Palladium-Catalyzed Direct Intermolecular Amination of Unactivated Methylene C(sp<sup>3</sup>)–H Bonds with Azodiformates via Bidentate-Chelation Assistance
An efficient and convenient method enabling direct amination of unactivated methylene C(sp3)–Hbonds to form C–N bonds with azodiformates as amino source is described. This method highlights the emerging strategy of unactivated methylene as versatile functional groups in organic synthesis and provides a strategy to construct functionalized C–N bonds for the synthesis of complex molecules.
Pd(ii)-catalyzed alkoxylation of unactivated C(sp3)–H and C(sp2)–H bonds using a removable directing group: efficient synthesis of alkyl ethers
作者:Fa-Jie Chen、Sheng Zhao、Fang Hu、Kai Chen、Qi Zhang、Shuo-Qing Zhang、Bing-Feng Shi
DOI:10.1039/c3sc51993g
日期:——
The Pd(II)-catalyzed alkoxylation of unactivated C(sp3)–H and C(sp2)–Hbonds using a new bidentate directing group has been developed. Alkoxylation occurs selectively at the β position with broad substrate scope and high tolerance of functional groups (chloro, cyano, ether, ester, olefin, amino, etc.). Besides alkoxylation of the β-C–H bonds, γ-alkoxylation of C(sp2)–Hbonds could also be achieved
Pd/Cu-Catalyzed Cascade C(sp<sup>3</sup>)–H Arylation and Intramolecular C–N Coupling: A One-Pot Synthesis of 3,4-2<i>H</i>-Quinolinone Skeletons
作者:Han-Zhi Xiao、Wen-Shu Wang、Yu-Song Sun、Hao Luo、Bo-Wen Li、Xiao-Dong Wang、Wei-Li Lin、Fei-Xian Luo
DOI:10.1021/acs.orglett.9b00214
日期:2019.3.15
In this letter, we successfully explored a cascade Pd/Cu-catalyzed intermolecular C(sp3)–H arylation of amides and intramolecular C–N coupling reaction. This method provides a one-pot strategy to synthesize 3,4-2H-quinolinone with good regioselectivity of C–H arylation and C–N coupling from C–I and C–X bonds from readily available starting materials.