The synthesis, optical resolution through derivatization, characterization and utilization of a new helical bisphosphinite–gold complex derived from HELIXOL are described.
Kinetic Resolutions by Enantioselective Pauson-Khand-Type Reaction
作者:Dong Eun Kim、Jaesung Kwak、In Su Kim、Nakcheol Jeong
DOI:10.1002/adsc.200800657
日期:2009.1
A kineticresolution of 1-arylallyl propargyl ethers by enantioselectivePauson–Khand-typereaction catalysts was successfully carried out. While cationic rhodium(I) with a BINAP-based ligand having an electron-deficient phosphine is the choice for the slow reacting substrates, neutral iridium(I) with a BINAP-based ligand possessing an electron-rich phosphine provided excellent results for the more
Asymmetric Au-catalyzed cycloisomerization of 1,6-enynes: An entry to bicyclo[4.1.0]heptene
作者:Alexandre Pradal、Chung-Meng Chao、Patrick Y Toullec、Véronique Michelet
DOI:10.3762/bjoc.7.116
日期:——
A comprehensive study on the asymmetric gold-catalyzedcycloisomerizationreaction of heteroatom tethered 1,6-enynes is described. The cycloisomerizationreactions were conducted in the presence of the chiral cationic Au(I) catalyst consisting of (R)-4-MeO-3,5-(t-Bu)(2)-MeOBIPHEP-(AuCl)(2) complex and silver salts (AgOTf or AgNTf(2)) in toluene under mild conditions to afford functionalized bicyclo[4
Asymmetric Au(i)-catalyzed synthesis of bicyclo[4.1.0]heptene derivatives via a cycloisomerization process of 1,6-enynes
作者:Chung-Meng Chao、Denis Beltrami、Patrick Y. Toullec、Véronique Michelet
DOI:10.1039/b913554e
日期:——
presence of a chiral cationic Au(i) catalyst ((R)-4-MeO-3,5-(t-Bu)(2)-MeOBIPHEP-(AuCl)(2)/AgOTf system) in toluene under mild conditions and lead to functionalized bicyclo[4.1.0]heptenederivatives in excellent enantiomeric excesses ranging from 90-98%.