Ruthenium-Catalyzed Hydroarylation and One-Pot Twofold Unsymmetrical C−H Functionalization of Arenes
作者:Koushik Ghosh、Raja K. Rit、E. Ramesh、Akhila K. Sahoo
DOI:10.1002/anie.201600649
日期:2016.6.27
excellent yields. A one‐pot, unsymmetrical, twofold C−H functionalization involving intramolecular C−C and intermolecular C−C/C−N bond formations is successfully demonstrated by using a single set of catalytic reaction conditions, which is unprecedented thus far. A novel isoquinolone‐bearing dihydrobenzofuran is constructed through an unsymmetrical twofold C−H functionalization.
The solvent effect on the reaction constants of tert-butyl radical addition to 2-substituted allyl chlorides
作者:Yuh-Wern Wu、Hsu-Ting Huang、Zhau-Jie Huang、Huang-Ming Huang、Jyh-Ferng Yang
DOI:10.1016/j.tet.2005.02.083
日期:2005.5
values of freeradical SH2′ reactions have been determined in various solvents. The correlation of Hammett ρ with Taft's π* gives a W value of 0.70. The W value is a measure of susceptibility of the reaction constant to change in solventpolarity. However, the W value is 2.64 in the dissociation reactions of substituted benzoic acids. The freeradicalreactions are less susceptible to the solvent effect
自由基S H 2'反应的ρ值已在各种溶剂中确定。哈米特的相关ρ与塔夫脱的π*给出了一个W¯¯的0.70值。该w ^值是反应常数在溶剂极性变化的敏感性的量度。但是,在取代的苯甲酸的离解反应中,W值为2.64。自由基反应比离子反应更不易受溶剂作用的影响,这可以合理化,因为在自由基反应的过渡态中形成的部分电荷小于杂合反应的部分电荷。S H中的ρ值2'反应可能无法真正反映过渡态下的部分电荷分离,但是,它可能是反应对替代物电子效应的敏感性的量度。
Allylmetallation of 1-silylalkynes by 2-(bromozincmethyl)-2-alkenyl ethers followed by Pd(0)-catalyzed cyclization: A one-pot synthesis of 4-methylenecyclopentenes
作者:Jaap van der Louw、Juul L. van der Baan、Franciscus J.J. de Kanter、Friedrich Bickelhaupt、Gerhard W. Klumpp
DOI:10.1016/s0040-4020(01)89857-4
日期:1992.1
Reaction of 2-(bromozincmethyl)-2-alkenyl ethers 1a,b,c,d with 1-(trimethylsilyl)-1-alkynes 2 afforded carbometallation products 3, which were converted by Pd(0)-catalyzed cyclization to 4-methylenecyclopentenes 5. The rates of both the addition and cyclization step depend on the concentration of the organozinc compound and the preparation of 5 is best performed using a 1.4–1.8 M solution of 1. At
4-((phenoxyalkyl)thio)-phenoxyacetic acids and analogs
申请人:Kuo Gee-Hong
公开号:US20050107469A1
公开(公告)日:2005-05-19
The invention features 4-((phenoxyalkyl)thio)-phenoxyacetic acids and analogs, compositions containing them, and methods of using them as PPAR delta modulators to treat or inhibit the progression of, for example, dyslipidemia.