The first example of enantioselective isocyanosilylation of meso epoxides with TMSCN catalyzed by novel chiral organogallium and indium complexesElectronic supplementary information (ESI) available: Characterization data, chiral analysis and determination of absolute configuration. See http://www.rsc.org/suppdata/cc/b2/b212511k/
作者:Chengjian Zhu、Fang Yuan、Weijin Gu、Yi Pan
DOI:10.1039/b212511k
日期:2003.3.6
The desymmetrization ring opening of meso epoxides using trimethylsilyl cyanide catalyzed by organogallium and indium complexes with binaphthol monoether derivatives as chiral ligands gave beta-isocyanohydrins with moderate to excellent enantioselectivities of up to 95% ee.
使用有机镓和铟配合物与联萘酚单醚衍生物作为手性配体催化的内消旋环氧化物的去对称开环得到具有高达 95% ee 的中等至优异对映选择性的 β-异氰醇。
Asymmetric ring opening of epoxides with cyanides catalysed by chiral binuclear titanium complexes
作者:Victor I. Maleev、Denis A. Chusov、Lidiya V. Yashkina、Nikolai S. Ikonnikov、Michail M. Il’in
DOI:10.1016/j.tetasy.2014.04.012
日期:2014.5
A series of Schiff bases obtained from salicylaldehydes and 3,3′-diformyl-BINOL were synthesized. The complexes of these Schiff bases with Ti(IV) were active for the asymmetric ring opening of epoxides with TMSCN. A mixture of unpurified ligands was found to be as effective as the best one. The influence of temperature, solvent polarity and structural modification of the pre-catalysts on the enantioselectivity
Asymmetric meso-Epoxide Ring-Opening with Trimethylsilyl Cyanide Promoted by Chiral Binuclear Complexes of Titanium. Dichotomy of CC versus CN Bond Formation
作者:Yuriâ N. Belokon、Denis Chusov、Alexanderâ S. Peregudov、Lidiaâ V. Yashkina、Galinaâ I. Timofeeva、Victorâ I. Maleev、Michael North、Henriâ B. Kagan
DOI:10.1002/adsc.200900523
日期:2009.12
In the presence of chiral catalysts derived from the same chiral hexadentate ligand and aluminium, zinc or titanium ions, the reaction between cyclohexene oxide and trimethylsilyl cyanide can be controlled to give predominantly either the nitrile (up to 99% ee) or the isonitrile product (up to 94% ee). The metal ion, ligand stereochemistry and base concentration all play a role in determining the product