Pd-catalyzed α-olefinic C-H activation of simple α,β-unsaturated olefins has been developed. 4-imino-β-lactam derivatives were readily synthesized via activation of α-olefinic C-H bonds with excellent cis stereoselectivity. A wide range of heterocycles at the β-position are compatible with this reaction. The product of 4-imino-β-lactam derivatives can be readily converted to 2-aminoquinoline which
Regioselective synthesis of multisubstituted isoquinolones and pyridones via Rh(<scp>iii</scp>)-catalyzed annulation reactions
作者:Liangliang Shi、Ke Yu、Baiquan Wang
DOI:10.1039/c5cc05977a
日期:——
A mild and efficient Rh(III)-catalyzedregioselective synthesis of isoquinolones and pyridones has been developed. The protocol uses readily available N-methoxybenzamide or N-methoxymethacrylamide and diazo compounds as the starting materials. The...
Rh(III)- and Ir(III)-Catalyzed C–H Alkynylation of Arenes under Chelation Assistance
作者:Fang Xie、Zisong Qi、Songjie Yu、Xingwei Li
DOI:10.1021/ja501910e
日期:2014.3.26
Rh(III)- and Ir(III)-catalyzed, chelation-assisted C-H alkynylation of a broad scope of (hetero)arenes has been developed using hypervalent iodine-alkyne reagents. Heterocycles, N-methoxy imines, azomethine imines, secondary carboxamides, azo compounds, N-nitrosoamines, and nitrones are viable directing groups to entail ortho C-H alkynylation. The reaction proceeded under mild conditions and with controllable
Ruthenium-Catalyzed C–H Allylation of Alkenes with Allyl Alcohols via C–H Bond Activation in Aqueous Solution
作者:Xiaowei Wu、Haitao Ji
DOI:10.1021/acs.joc.8b02063
日期:2018.10.5
A robust Ru(II)-catalyzed C–H allylation of electron-deficient alkenes with allylalcohols in aqueous solution is reported. This method provides a straightforward and efficient access to the synthetically useful 1,4-diene skeletons. With the assistance of the N-methoxycarbamoyl directing group, this allylation reaction features a broad substrate scope with good functional group tolerance, excellent
A direct cross-coupling reaction of electron-deficient alkenes using an oxidizing directing group
作者:Chunbing Yu、Feifei Li、Jian Zhang、Guofu Zhong
DOI:10.1039/c6cc07064g
日期:——
An oxidant-free cross-couplingreaction of electron-deficient alkenes is reported, using inexpensive ruthenium catalyst. With the assistance of the oxidizing directing group CONH(OMe), this protocol provides a mild, straightforward and efficient...