130059-81-3Relevant articles and documents
Highly enantioselective epoxidation of 2,4-diarylenones by using dimeric cinchona phase-transfer catalysts: Enhancement of enantioselectivity by surfactants
Jew, Sang-Sup,Lee, Jeong-Hee,Jeong, Byeong-Seon,Yoo, Mi-Sook,Kim, Mi-Jeong,Lee, Yeon-Ju,Lee, Jihye,Choi, Sea-Hoon,Lee, Kyungjae,Lah, Myoung Soo,Park, Hyeung-Geun
, p. 1383 - 1385 (2005)
Dramatic increases in reaction rates and enantioselectivities can be effected by the use of surfactants for the phase-transfer catalytic epoxidation of aromatic enones. Based on the X-ray crystal structure of the most effective catalyst-a modified cinchona alkaloid-a plausible transition state of the reaction has been modeled (see picture; HOO- yellow, C gray, H white, N blue, O red).
Heterogenization of Shibasaki's binol/La catalyst for enantioselective epoxidation of α,β-unsaturated ketones with multitopic binol ligands: The impact of bridging spacers
Wang, Xingwang,Shi, Lei,Li, Mingxing,Ding, Kuiling
, p. 6362 - 6366 (2005)
(Figure Presented) Bridging the gap: Heterogenized Shibasaki's binol/La catalyst is synthesized by a self-supporting strategy through the reactions of multitopic ligands with La(OiPr)3 (see picture). The catalyst shows high activity and enantioselectivity, and can be reused in the asymmetric epoxidation of α,β-unsaturated ketones.
Asymmetric epoxidation of α,β-unsaturated ketones catalyzed by rare-earth metal amides RE[N(SiMe3)2]3with chiral TADDOL ligands
Shan, Haiwen,Lu, Chengrong,Zhao, Bei,Yao, Yingming
, p. 1043 - 1053 (2021/01/25)
The catalytic asymmetric epoxidation of α,β-unsaturated ketones by tert-butylhydroperoxide (TBHP) has been well established using rare-earth metal amides RE[N(SiMe3)2]3 (RE = La(1), Nd(2), Sm(3), Y(4), Yb(5)) with chiral TADDOL ligands. It was found that
Ligand regulation for manganese-catalyzed enantioselective epoxidation of olefins without acid
Xu, Daqian,Sun, Qiangsheng,Lin, Jin,Sun, Wei
supporting information, p. 13101 - 13104 (2020/11/09)
A novel manganese catalyst bearing an l-proline-derived N4 ligand has been developed for enabling acid-free asymmetric epoxidation of olefins with tert-butyl hydroperoxide as the oxidant. A variety of olefins that are well-matched in size with the ligand