Low pressure vinylation of aryl and vinyl halides via Heck–Mizoroki reactions using ethylene
作者:Craig R. Smith、T.V. RajanBabu
DOI:10.1016/j.tet.2009.11.017
日期:2010.1
and 2 equiv of potassium acetate react with ethylene under ambient pressure (15–30 psi) to give the corresponding vinylarenes. The reactions work with both electron-deficient and electron-rich aryl compounds and tolerate wide variety of common functional groups. Vinyl bromides lead to 1,3-dienes in moderate yields.
Regioselective Arylboration of Isoprene and Its Derivatives by Pd/Cu Cooperative Catalysis
作者:Kevin B. Smith、M. Kevin Brown
DOI:10.1021/jacs.7b04024
日期:2017.6.14
A method for the regioselective arylboration of isoprene and its derivatives is presented. These reactions allow for the synthesis of useful building blocks from simple components. Through these studies, an unusual additive effect with DMAP has been uncovered that allows for altered reactivity and the formation of quaternary carbon centers. The utility of this method is demonstrated toward the formal
Palladium-catalyzed coupling of vinyl triflates with organostannanes. Synthetic and mechanistic studies
作者:William J. Scott、J. K. Stille
DOI:10.1021/ja00271a037
日期:1986.5
The palladium-catalyzedcoupling reaction of vinyltriflates with acetylenic, vinyl, allyl, and alkyl tin reagents in the presence of lithium chloride or another suitable salt takes place in high yields under mild reaction conditions; however, benzyl and phenyl tin reagents give poor yield of coupled product. The utilization of a tin or silicon hydride reagent in place of the organotin partner yields
Palladium-Catalyzed Hydroarylation of 1,3-Dienes with Boronic Esters via Reductive Formation of π-Allyl Palladium Intermediates under Oxidative Conditions
作者:Longyan Liao、Matthew S. Sigman
DOI:10.1021/ja105010t
日期:2010.8.4
A palladium-catalyzed reductive cross-coupling of 1,3-dienes with boronicesters in which a pi-allyl Pd species is generated directly from a 1,3-diene via a Pd-catalyzed aerobicalcoholoxidation is reported. Both the scope of the process and the origin of a highly selective 1,2-addition are discussed.
Triarylphosphine Ligands with Hemilabile Alkoxy Groups: Ligands for Nickel(II)-Catalyzed Olefin Dimerization Reactions. Hydrovinylation of Vinylarenes, 1,3-Dienes, and Cycloisomerization of 1,6-Dienes
作者:Souvagya Biswas、Aibin Zhang、Balaram Raya、T. V. RajanBabu
DOI:10.1002/adsc.201400237
日期:2014.7.7
practical synthesis of these compounds. In sharp contrast, hydrovinylation of a variety of 1,3‐dienes is best catalyzed by nickel(II) complexes of 2‐benzyloxyphenyldiphenylphosphine, L5. The other two ligands, 2‐benzyloxymethyl‐ (L6) and 2‐benzyloxyethyldiphenylphosphine (L7) are much less effective in the HV of 1,3‐dienes. Nickel(II)‐catalyzed cycloisomerization of 1,6‐dienes into methylenecyclopentanes