128134-36-1Relevant articles and documents
Superactive Mg-Al-O-t-Bu hydrotalcite for epoxidation of olefins
Choudary,Lakshmi Kantam,Bharathi,Venkat Reddy
, p. 1203 - 1204 (1998)
Epoxidation of unfunctionalised olefins and α,β-unsaturated ketones has been accomplished at an amazingly and unprecedented rate by superactive Mg-Al-O-t-Bu-hydrotalcite solid base catalyst prepared in our laboratory.
Asymmetric Epoxidation of α,β-Unsaturated Ketones Catalyzed by Chiral Polybinaphthyl Zinc Complexes: Greatly Enhanced Enantioselectivity by a Cooperation of the Catalytic Sites in a Polymer Chain
Yu, Hong-Bin,Zheng, Xiao-Fan,Lin, Zhi-Ming,Hu, Qiao-Sheng,Huang, Wei-Sheng,Pu, Lin
, p. 8149 - 8155 (1999)
Polybinaphthyl zinc catalysts have been developed for the asymmetric epoxidation of a,/3-unsaturated ketones in the presence of tert-butyl hydroperoxide. Up to 81% ee has been achieved for the epoxidation of α,β-unsaturated ketones containing β-aliphatic
Phase-transfer catalyzed asymmetric epoxidation of chalcones using chiral crown ethers derived from D-glucose, D-galactose, and D-mannitol
Bako, Tibor,Bako, Peter,Keglevich, Gyoergy,Bombicz, Petra,Kubinyi, Miklos,Pal, Krisztina,Bodor, Sandor,Mako, Attila,Toke, Laszlo
, p. 1589 - 1595 (2004)
Chiral monoaza-15-crown-5 lariat ethers synthesized from D-glucose, D-galactose, and D-mannitol have been applied as phase-transfer catalysts in the enantioselective epoxidation of chalcones with tert-butylhydroperoxide. The type of monosaccharide on the
Asymmetric Epoxidation of Chalcones with Chirally Modified Lithium and Magnesium tert-Butyl Peroxides
Elston, Catherine L.,Jackson, Richard F. W.,MacDonald, Simon J. F.,Murray, P. John
, p. 410 - 412 (1997)
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Highly catalytic enantioselective epoxidation of enones with weak base bicarbonate and hydrogen peroxide
Da, Chao-Shan,Wei, Jie,Dong, Shou-Liang,Xin, Zhuo-Qun,Liu, Da-Xue,Xu, Zhao-Qin,Wang, Rui
, p. 2787 - 2792 (2003)
The weak basic bicarbonate-activated hydrogen peroxide is applied to the catalytic asymmetric epoxidation of the enones, and the catalyst polyleucine cannot be deteriorated and can successfully be reused in this asymmetric reaction. The ee value of the op
Organocatalytic Enantioselective γ-Elimination: Applications in the Preparation of Chiral Peroxides and Epoxides
Chen, Zhili,Gong, Xiangnan,Hu, Fangli,Huang, Shengli,Jia, Shiqi,Qin, Wenling,Tan, Yu,Xu, Da,Yan, Hailong
, p. 1934 - 1940 (2020/03/24)
An organocatalyzed enantioselective γ-elimination process has been achieved and applied in the kinetic resolution of peroxides to access chiral peroxides and epoxides. The reaction provided a pathway for the preparation of two useful synthetic and biologically important structural motifs through a single-step reaction. A range of substrates has been resolved with a selectivity factor up to 63. The obtained enantioenriched peroxides and epoxides allowed a series of transformations with retained optical purities.
Visible Light-Induced Aerobic Epoxidation of α,β-Unsaturated Ketones Mediated by Amidines
Wu, Yufeng,Zhou, Guangli,Meng, Qingwei,Tang, Xiaofei,Liu, Guangzhi,Yin, Hang,Zhao, Jingnan,Yang, Fan,Yu, Zongyi,Luo, Yi
, p. 13051 - 13062 (2018/10/25)
An aerobic photoepoxidation of α,β-unsaturated ketones driven by visible light in the presence of tetramethylguanidine (3b), tetraphenylporphine (H2TPP), and molecular oxygen under mild conditions was revealed. The corresponding α,β-epoxy ketones were obtained in yields of up to 94% in 96 h. The reaction time was shortened to 4.6 h by flow synthesis. The mechanism related to singlet oxygen was supported by experiments and density functional theory (DFT) calculations.
