Design and Synthesis of Polymeric Chiral Bicyclo[3.3.0] Diene as Reusable Ligand for Rhodium-Catalyzed Asymmetric 1,4-Addition
作者:Hongyu Yang、Minghua Xu
DOI:10.1002/cjoc.201201079
日期:2013.1
A series of A‐B type sterically regular bicyclio[3.3.0] diene‐based polymers were designed and synthesized as immobilized chiraldieneligands for asymmetric catalysis. With polymericdiene 6b, good to excellent enantioselectivities can be achieved in Rh‐catalyzed asymmetric 1,4‐addition of arylboronic acids to α,β‐unsaturated ketones.
Electronic and Steric Tuning of an Atropisomeric Disulfoxide Ligand Motif and Its Use in the Rh(I)-Catalyzed Addition Reactions of Boronic Acids to a Wide Range of Acceptors
作者:Guang-Zhen Zhao、Daven Foster、Gellért Sipos、Pengchao Gao、Brian W. Skelton、Alexandre N. Sobolev、Reto Dorta
DOI:10.1021/acs.joc.8b01269
日期:2018.9.7
efficiently to the rhodium precursor. The performance of this disulfoxide ligand [(M,S,S)-p-Tol-6F-BIPHESO] in catalysis was tested in both 1,4- and 1,2-addition reactions of arylboronic acids. We show that addition to both cyclic and acyclic enones as well as N-tosylarylimines proceeds with high yields and high enantioselectivities to give the corresponding products. The synthesis of enantiomerically pure p-Tol-6F-BIPHESO
Readily Accessible Chiral Diene Ligands for Rh-Catalyzed Enantioselective Conjugate Additions of Boronic Acids
作者:Barry M. Trost、Aaron C. Burns、Thomas Tautz
DOI:10.1021/ol201754c
日期:2011.9.2
the broad scope of the Pd-catalyzed asymmetric alkylation of meso- and d,l-divinylethylene carbonate, several chiral diene ligands were prepared in two steps from commercial materials. Subsequently, these ligands were evaluated in the Rh-catalyzed asymmetric conjugateaddition of boronic acids to enones.
Chiral porous organic frameworks for asymmetric heterogeneous catalysis and gas chromatographic separation
作者:Jinqiao Dong、Yan Liu、Yong Cui
DOI:10.1039/c4cc07648f
日期:——
Three chiral robust diene-based porous organic frameworks (POFs) are prepared. POF-1 is shown to be an efficient heterogeneous catalyst after metallation for asymmetric conjugation addition with up to 93% ee, and it can also function as a new chiral stationary phase for gas chromatographic separation of racemates.
A Chiral Bis-Sulfoxide Ligand in Late-Transition Metal Catalysis; Rhodium-Catalyzed Asymmetric Addition of Arylboronic Acids to Electron-Deficient Olefins
A bis-sulfoxide with a binaphthyl backbone is introduced as a readily available, chiralligand entity in late-transition metal catalysis. Ligand p-tol-BINASO [where p-tol-BINASO is 1,1‘-binaphthalene-2,2‘-diyl-bis-(p-tolylsulfoxide)] is obtained in pure form in one single synthetic step from relatively cheap, commercially available starting materials. Precatalyst [(P,R,R)-p-tol-BINASO}RhCl]2 was synthesized