Copper- and Nickel-Catalyzed Cross-Coupling Reaction of Monofluoroalkenes with Tertiary, Secondary, and Primary Alkyl and Aryl Grignard Reagents
作者:Hongyan Shi、Wenpeng Dai、Biyun Wang、Song Cao
DOI:10.1021/acs.organomet.7b00859
日期:2018.2.12
with tertiary, secondary, and primary alkyl and aryl Grignardreagents in the presence of a catalytic amount of copper or nickel catalyst, respectively, has been developed. The reactions proceeded smoothly at room temperature, providing (E)-alkene isomers in moderate to high yields. Plausible mechanisms of the Ni-catalyzed coupling reaction of monofluoroalkene with Grignardreagents are suggested.
Pincer Complex-Catalyzed Redox Coupling of Alkenes with Iodonium Salts via Presumed Palladium(IV) Intermediates
作者:Juhanes Aydin、Johanna M. Larsson、Nicklas Selander、Kálmán J. Szabó
DOI:10.1021/ol9010739
日期:2009.7.2
Palladium pincer complexes directly catalyze the redox coupling reactions of functionalized alkenes and iodonium salts. The catalytic process, which is suitable for mild catalytic functionalization of allylic acetates and electron-rich alkenes, probably occurs through Pd(IV) intermediates. Due to the strong metal−ligand interactions, the oxidation of phosphine and amine ligands of the pincer complexes
Highly stereoselective synthesis of <i>trans</i>-alkenes <i>via</i> electrochemical Ni-catalyzed hydroarylation of alkynes with aryl iodides
作者:Haoxiang Zhang、Lin Guo、Chao Yang、Wujiong Xia
DOI:10.1039/d3ob00705g
日期:——
An electrochemical nickel catalyzed hydroarylation reaction of various alkynes is herein described. In this reaction, alkynes were coupled with aryl iodides by electrochemical Ni catalysis to obtain highly selective trans-olefins. The outstanding features of this protocol include mild reaction conditions, operational simplicity, and excellent functional group tolerance.
Switchable Decarboxylative Heck-Type Reaction and Oxo-alkylation of Styrenes with <i>N</i>-Hydroxyphthalimide Esters under Photocatalysis
作者:Zi-Hao Xia、Chun-Lin Zhang、Zhong-Hua Gao、Song Ye
DOI:10.1021/acs.orglett.8b01268
日期:2018.6.15
The switchable visible-light-mediated decarboxylative Heck-type reaction and oxo-alkylation reaction of N-hydroxyphthalimide esters under photocatalysis were developed. Disubstituted or trisubstituted alkenes were obtained in good yield with high E-selectivity in the presence of Bronsted acid as the additive, while ketones resulted in the absence of the acidic additive.
Irradiation-Induced Heck Reaction of Unactivated Alkyl Halides at Room Temperature
作者:Guang-Zu Wang、Rui Shang、Wan-Min Cheng、Yao Fu
DOI:10.1021/jacs.7b10009
日期:2017.12.20
eliminable β-hydrogen atoms. Whereas most palladium-catalyzed cross-coupling reactions utilize the ground-state reactivity of palladium complexes under thermal conditions and generally apply a single ligand system, we report that the palladium-catalyzedHeckreaction proceeds smoothly at room temperature with a variety of tertiary, secondary, and primary alkylbromides upon irradiation with blue light-emitting