Nickel-Catalyzed Direct Synthesis of Aryl Olefins from Ketones and Organoboron Reagents under Neutral Conditions
作者:Chuanhu Lei、Yong Jie Yip、Jianrong Steve Zhou
DOI:10.1021/jacs.7b02742
日期:2017.5.3
Nickel-catalyzed addition of arylboron reagents to ketones results in aryl olefins directly. The neutral condition allows acidic protons of alcohols, phenols, and malonates to be present, and fragile structures are also tolerated.
Sulfur Mediated Allylic C–H Alkylation of Tri- and Disubstituted Olefins
作者:Gang Hu、Jiaxi Xu、Pingfan Li
DOI:10.1021/ol5031348
日期:2014.11.21
, sulfur mediated allylic C–H alkylation reaction through a one-pot procedure involving an ene-like step between simple olefins and activated sulfoxides to generate allylic sulfonium intermediates, and a subsequent [2,3]-sigmatropic rearrangement step under basic conditions to give allylic C–H alkylation products, has been developed. This method is applicable to tri- and disubstituted olefin substrates
Regioselectivity in the Catalytic Hydrogenolysis of 7-Fluoro-1-phenylbicyclo[4.1.0]heptanes
作者:Koji Isogai、Jun-ichi Sakai、Katsuhiko Kosugi
DOI:10.1246/bcsj.59.1349
日期:1986.5
7-difluoro-1-phenylbicyclo[4.1.0]heptane was investigated. The hydrogenolysis of the cyclopropane ring occurs at the C1–C6 bond selectively, accompanied by the elimination of the endo-halogen. The hydrogenolysis of endo-7-fluoro-1-phenylbicyclo[4.1.0]heptane proceeded rapidly to give phenylcycloheptane as a sole product, whereas exo-7-fluoro-1-phenylbicyclo[4.1.0]heptane reacted slowly to give tra
Cu-catalyzed AAA reactions employing racemic cyclicallylic bromide and extremely reactive organolithium reagents as reaction partners have been disclosed. The corresponding alkylated products were obtained with high enantioselectivities (up to 98 % ee).