Efficient Chiral Monophosphorus Ligands for Asymmetric Suzuki–Miyaura Coupling Reactions
作者:Wenjun Tang、Nitinchandra D. Patel、Guangqing Xu、Xiaobing Xu、Jolaine Savoie、Shengli Ma、Ming-Hong Hao、Santosh Keshipeddy、Andrew G. Capacci、Xudong Wei、Yongda Zhang、Joe J. Gao、Wenjie Li、Sonia Rodriguez、Bruce Z. Lu、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol300659d
日期:2012.5.4
A series of novel P-chiral monophosphorus ligands exhibit efficiency in asymmetric Suzuki–Miyaura coupling reactions, enabling the construction of an array of chiral biaryl products in high yields and excellent enantioselectivities (up to 96% ee) under mild conditions. The carbonyl-benzooxazolidinone moiety in these chiral biaryl products allows facile derivatization for further synthetic applications
In Situ Generation of Ruthenium Carbonyl Phosphine Complexes as a Versatile Method for the Development of Enantioselective C−O Bond Arylation
作者:Hikaru Kondo、Takuya Kochi、Fumitoshi Kakiuchi
DOI:10.1002/chem.201905157
日期:2020.2.6
various ruthenium carbonyl phosphine catalysts for arylation via cleavage of inert aromatic carbon-oxygen bonds. The use of catalyst systems consisting of [RuCl2 (CO)(p-cymene)], CsF, styrene, and phosphines enabled facile screening of phosphine ligands. Asymmetric C-O arylation was also achieved for atropo-enantioselective biaryl synthesis using a chiral monodentate phosphine ligand.
Directed metalation/ligand coupling approach to the enantioselective synthesis of 1,1′-binaphthyls
作者:Robert W. Baker、Geoffrey R. Pocock、Melvyn V. Sargent、Edi Twiss (née Stanojevic)
DOI:10.1016/s0957-4166(00)82215-6
日期:1993.1
Introduction of a 2-isopropoxycarbonyl or 2-N,N-dimethylcarbamoyl group into homochiral 1-p-tolyl- or 1-t-butyl-sulfinylnaphthalenes, via directed metalation reaction, followed by ligand coupling reaction with 1-naphthylmagnesium bromide, furnished atropisomeric 1,1'-binaphthyls in 82-95% enantiomeric excess (e.e.).