162213-03-8Relevant articles and documents
Synthesis of homochiral bis(oxazolinyl)pyridine type ligands for asymmetric cyclopropanation reactions
Gupta,Bhuniya,Singh
, p. 13725 - 13730 (1994)
Homochiral bis(oxazolinyl)pyridine type ligands were synthesized from (S)-valine and converted into their Cu(II) complexes. Reduction of these Cu(II) complexes into Cu(I) with diazoesters was studied by uv-vis and epr spectroscopy. The enantioselective cy
A Ce(OTf)3/PyBox catalyzed enantioselective Hosomi-Sakurai reaction of aldehydes with allyltrimethylsilane
Zhao, Song,Zhang, Xulong,Zhang, Yuwei,Yang, Huanhuan,Huang, Yan,Zhang, Kui,Du, Ting
supporting information, p. 7734 - 7737 (2015/10/12)
An efficient enantioselective Hosomi-Sakurai reaction catalyzed by a chiral Ce(OTf)3/PyBox complex has been explored. In the presence of 20 mol% of a chiral catalytic complex prepared in situ from Ce(OTf)3 and 2,6-bis[(S)-4-isopropyl
Asymmetric Kharasch Reaction: Catalytic Enantioselective Allylic Oxidation of Olefins Using Chiral Pyridine Bis(diphenyloxazoline) - Copper Complexes and tert-Butyl Perbenzoate
Sekar, Govindasamy,Dattagupta, Arpita,Singh, Vinod K.
, p. 2961 - 2967 (2007/10/03)
Copper complexes of chiral pyridine bis(diphenyloxazoline)-type ligands have been studied as catalysts for the enantioselective allylic oxidation of olefins. Using 2.5-5 mol % of these chiral catalysts and tert-butyl perbenzoate as oxidant, optically active allylic benzoates were obtained in up to 86% ee. A variety of copper salts was studied under different conditions and in different solvents. Acetone was found to be a superior solvent for the reaction. Use of phenylhydrazine in conjunction with the chiral copper complex played a crucial role in increasing the rate of the reaction. Use of 4 ? molecular sieves increased the optical yield of product in almost every case.