A nordehydroabietyl amide-containing chiral diene for rhodium-catalysed asymmetric arylation to nitroolefins
作者:Ruikun Li、Zhongqing Wen、Na Wu
DOI:10.1039/c6ob02202b
日期:——
A highlyenantioselectiverhodium catalysed asymmetric arylation (RCAA) of nitroolefins with arylboronicacids is presented using a newly developed, C1-symmetric, non-covalent interacted, phellandrene derived, nordehydroabietyl amide-containing chiral diene under mild conditions. Stereoelectronic effects were studied, suggesting an activation of the bound substrate through the secondary amide as a
Palladium-Catalyzed Conjugate Addition of Organosiloxanes to α,β-Unsaturated Carbonyl Compounds and Nitroalkenes
作者:Scott E. Denmark、Nobuyoshi Amishiro
DOI:10.1021/jo034763r
日期:2003.9.1
aryltrialkoxysilanes to alpha,beta-unsaturated carbonylcompounds (ketones, aldehydes) and nitroalkenes in the presence of SbCl(3), TBAF, AcOH, and a catalytic amount of Pd(OAc)(2), in CH(3)CN at 60 degrees C, provides the corresponding conjugate addition products in moderate to good yields. The addition of equimolar amounts of SbCl(3) and TBAF is necessary for this reaction to proceed smoothly. The arylpalladium
Abstract Formation of stable and small-sized palladiumnanoparticles of diameter 9.4 nm was accomplished by a simple heating of Pd(OAc)2 in 1-octyl-1,2,4-triazolium trifluoroacetate ionicliquid under standard atmospheric hydrogen pressure. Palladiumnanoparticles were characterized by XRD, SEM, TEM, and EDX analysis techniques. The application of an addition reaction of arylboronic acid to nitrostyrenes provided
Palladium-Catalyzed Asymmetric Addition of Arylboronic Acids to Nitrostyrenes
作者:Qun He、Fang Xie、Guanghong Fu、Mao Quan、Chaoren Shen、Guoqiang Yang、Ilya D. Gridnev、Wanbin Zhang
DOI:10.1021/acs.orglett.5b00863
日期:2015.5.1
A palladium-catalyzedasymmetricaddition of arylboronicacids to nitrostyrene is reported. The catalytic system employing iPr-IsoQuinox as a chiral ligand in MeOH solvent under an air atmosphere provides the chiral diarylsubstituted products in high yields with good enantioselectivities. A variety of functionalized nitrostyrenes can be used, and the method tolerates some variation in arylboronic acid