579-44-2Relevant articles and documents
Asymmetric Hydrogenation Cazalyzed by Bis(disubstitiuted glyoximato)cobalt(II)-Chiral Cocatalyst System. Effect of Structural Variation of Ligands and Hydrogen Pressure
Ohgo, Yoshiaki,Tashiro, Yasuhisa,Takeuchi, Seiji
, p. 1549 - 1551 (1987)
The reaction rate was extremely enhanced by increasing the basicity of the axial ligand of and by increasing the hydrogen pressure without decreasing the enantioselectivity.Substituting one and two methyl groups of the dimethylglyoxime liga
Synthesis and immobilization of amylose derivatives bearing a 4-terf-butylbenzoate group at the 2-position and 3,5-dichlorophenylcarbamate/3- (triethoxysilyl)propylcarbamate groups at 3- And 6-positions as chiral packing material for HPLC
Shen, Jun,Ikai, Tomoyuki,Shen, Xiande,Okamoto, Yoshio
, p. 442 - 444 (2010)
Two novel amylose derivatives 2a and 2b bearing A-tertbutylbenzoate at the 2-position and 3,5-dichlorophenylcarbamate/3-(triethoxysilyl)propylcarbamate residues at 3- and 6positions were successfully synthesized and immobilized onto silica gel, and their chiral recognition abilities were evaluated as chiral packing materials (CPMs) for high-performance liquid chromatography. These immobilized CPMs exhibited recognition ability similar to conventional coated CPM, and for some racemates, comparable or better resolutions were observed even compared to commercial immobilized amylose- or cellulosebased columns.
Benzaldehyde lyase (BAL)-catalyzed enantioselective CC bond formation in deep-eutectic-solvents-buffer mixtures
Maugeri, Zaira,Dominguez De Maria, Pablo
, p. 120 - 123 (2014)
Deep-eutectic-solvents (DES) have emerged in the last decades as promising bio-based and biodegradable neoteric solvents for biocatalysis, with examples covering different enzymes (mostly hydrolases) and whole-cells (baker's yeast). This paper explores fo
Asymmetric reduction of benzil to (S)-benzoin with Penicillium claviforme IAM 7294 in a liquid-liquid interface bioreactor (L-L IBR)
Oda, Shinobu,Isshiki, Kunio
, p. 1364 - 1367 (2008)
The asymmetric reduction of benzyl to (S)-benzoin with Penicillium claviforme IAM 7294 was applied to a liquid-liquid interface bioreactor (L-L IBR) using a unique polymeric material, ballooned microsphere (MS). The L-L IBR showed superior performance, as
A holoenzyme model of thiamin dependent enzyme; asymmetrical acyloin condensation using a lipid catalyst in a bilayer membrane
Yamashita, Keiji
, p. 4817 - 4820 (1995)
Within a DPPC bilayer membrane, the lipid catalyst 1, having a thiazolium salt unit in the head group, exhibited catalytic activity and enantioselectivity in the acyloin condensation of benzaldehyde. The activity and enantioselectivity were strongly depen
105. A novel asymmetric benzoin reaction catalyzed by a chiral triazolium salt: Preliminary communication
Enders, Dieter,Breuer, Klaus,Teles, J. Henrique
, p. 1217 - 1221 (1996)
Using the chiral triazolium salt 1 as catalyst, a novel asymmetric variant of the benzoin reaction is reported. For the first time, the scope of the method is extended to a broader range of aromatic aldehydes 2, affording the acyloins 3a-h in yields of 22
Fungal deracemization of benzoin
Demir, Ayhan S,Hamamci, Haluk,Sesenoglu, Ozge,Neslihanoglu, Rahsan,Asikoglu, Beril,Capanoglu, Doga
, p. 6447 - 6449 (2002)
An enzyme system of Rhizopus oryzae (ATCC 9363) catalyzes the inversion of the chirality of benzoin via a deracemization reaction and, depending on the pH of the medium, both enantiomers of benzoin are obtained in good yield and high ee starting from rac-
Optimised dynamic kinetic resolution of benzoin by a chemoenzymatic approach in 2-MeTHF
Hoyos, Pilar,Quezada, M. Alberto,Sinisterra, Jose Vicente,Alcantara, Andres R.
, p. 20 - 24 (2011)
Different influential parameters in the Dynamic Kinetic Resolution of racemic benzoin via lipase-ruthenium catalyst enantioselective transesterification have been improved in order to develop a more productive process. In this sense, 2-Methyltetrahydrofur
SmI2-(Chiral Auxiliary)-Induced Asymmetric Reduction
Takeuchi, Seiji,Ohgo, Yoshiaki
, p. 403 - 404 (1988)
Benzyl was reduced to benzoin with 56.2 percent ee by a system of SmI2-THF-HMPA in the presence of quinidine.
Asymmetric Reactions. X. Asymmetric Hydrogenation Catalyzed by Bis(dimethylglyoximato)cobalt(II)-Chiral Cocatalyst (Amino Alcohol) System
Ohgo, Yoshiaki,Takeuchi, Seiji,Natori, Yukikazu,Yoshimura, Juji
, p. 2124 - 2135 (1981)
The catalytic asymmetric hydrogenations of α-diketones, α-keto carboxylates, α-(acylamino)acrylates, α-phenylacrylophenone, and α-phenylacrylate were examined with bis(dimethylglyoximato)cobalt(II)-chiral cocatalyst (amino alcohol) and with simple achiral
