An efficient nickel-catalyzed acceptorless dehydrogenative coupling of methyl-substituted heteroarenes with primary alcohols is achieved using an in situ generated complex of inexpensive NiBr2 and readilyavailable 8-aminoquinoline picolinic amide ligand. The protocol is operationally simple and scalable and furnishes a series of high-value 2-alkenylheteroarenes in good yields (up to 88%) with exclusive
Metal-free oxidative olefination of primary amines with benzylic C–H bonds through direct deamination and C–H bond activation
作者:Liang Gong、Li-Juan Xing、Tong Xu、Xue-Ping Zhu、Wen Zhou、Ning Kang、Bin Wang
DOI:10.1039/c4ob01025f
日期:——
An oxidative olefination reaction between aliphatic primary amines and benzylic sp3 C–H bonds has been achieved using N-bromosuccinimide as catalyst and tert-butyl hydroperoxide as oxidant. The olefination proceeds under mild metal-free conditions through direct deamination and benzylic C–Hbond activation, and provides easy access to biologically active 2-styrylquinolines with (E)-configuration.
Microwave-assisted solvent-free synthesis of 2-styrylquinolines in the presence of zinc chloride
作者:V. M. Li、T. N. Gavrishova、M. F. Budyka
DOI:10.1134/s1070428012060139
日期:2012.6
An efficient solvent-free procedure has been developed for the synthesis of (E)-2-styrylquinoline derivatives under microwave irradiation in the presence of zinc chloride. The developed procedure is advantageous due to shorter reaction time and simpler workup.
Doebner; Peters, Chemische Berichte, 1890, vol. 23, p. 1240