123333-23-3Relevant academic research and scientific papers
Iridium/f-Amphox-Catalyzed Asymmetric Hydrogenation of Styrylglyoxylamides
Wang, Simin,Yu, Yuena,Wen, Jialin,Zhang, Xumu
supporting information, p. 2203 - 2207 (2018/09/29)
We report an iridium-catalyzed asymmetric hydrogenation reaction for the preparation of chiral homophenylalanine derivatives. Catalyzed by an iridium/f-amphox complex, the asymmetric hydrogenation of styrylglyoxylamides was conducted smoothly with turnover numbers of up to 10,000 and up to 98% ee. This method was successfully applied in a synthesis of a fragment of benazepril, a drug used for the treatment of high blood pressure.
Direct asymmetric hydrogenation of 2-oxo-4-arylbut-3-enoic acids
Zhu, Lvfeng,Meng, Qinghua,Fan, Weizheng,Xie, Xiaomin,Zhang, Zhaoguo
supporting information; experimental part, p. 6027 - 6030 (2010/11/18)
A challenging direct asymmetric hydrogenation of (E)-2-oxo-4-arylbut-3- enoic acids to give 2-hydroxy-4-arylbutanoic acids (85.4-91.8% ee) was achieved with a Ru catalyst based on SunPhos as the chiral ligand. Further investigation of the reaction revealed that partial isomerization of 2-hydroxy-4-arylbutenoic acids was involved in the hydrogenation process. Employing the reaction conditions to the hydrogenation of 2-oxo-4-phenylbutanoic acid resulted in better enantioselectivity (91.8% ee) and efficiency (TON = 2000, TOF = 200 h-1), which offers a useful method for the synthesis of a common intermediate for ACE inhibitors.
An efficient synthesis of novel hexahydropyrido[2,3-d]pyrimidine derivatives from (arylmethylidene)pyruvic acids =(3E)-4-aryl-2-oxobut-3-enoic acids in aqueous media
Balalaie, Saeed,Abdolmohammadi, Shahrzad,Soleimanifard, Bita
body text, p. 932 - 936 (2009/08/14)
A series of new hexahydropyrido[2,3-d]pyrimidine derivatives 3 were synthesized by the cyclo-condensation reaction of (arylmethylidene)pyruvic acids (=(3E)-4-aryl-2-oxobut-3-enoic acids) 1 and 6-aminouracils (=6-aminopyrimidine- 2,4(1H,3H)-diones) 2 in H
Covalently linked ruthenium(II)-manganese(II) complexes: Distance dependence of quenching and electron transfer
Berg, Katja E.,Tran, Anh,Raymond, Mary Katherine,Abrahamsson, Malin,Wolny, Juliusz,Redon, Sophie,Andersson, Mikael,Sun, Licheng,Styring, Stenbj?rn,Hammarstr?m, Leif,Toftlund, Hans,?kermark, Bj?rn
, p. 1019 - 1029 (2007/10/03)
Continuing our development of artificial models for photosystem II in green plants, a series of compounds have been prepared in which a Ru(bpy)32+ photosensitizer is covalently linked to a manganese(II) electron donor. In addition to a trispicolylamine ligand, two other manganese ligands, dipicolylamine and aminodiacetic acid, have been introduced in order to study ligands that are appropriate for the construction of manganese dimers with open coordination sites for the binding of water. Coordination equilibria of the manganese ions were monitored by EPR. The interactions between the ruthenium and manganese moieties were probed by flash photolysis, cyclic voltammetry and steady-state and time-resolved emission measurements. The quenching of the RuII excited state by MnII was found to be rapid in complexes with short Ru-Mn distances. Nevertheless, each RuII species could be photo-oxidized by bimolecular quenching with methylviologen, and the subsequent electron transfer from MnII to RuIII could be monitored.
(E)-4-(α-Halo-p-tolyl)-2-oxo-3-butenoic Acids Inhibit Yeast Pyruvate Decarboxylase by a Diversity of Mechanisms: Multiple Fate for the Thiamin-Bound Enamine Intermediate
Annan, Nikoi,Paris, Richard,Jordan, Frank
, p. 8895 - 8901 (2007/10/02)
(E)-4-(p-Tolyl)-2-oxo-3-butenoic acid and its α-(bromomethyl) and α-(chloromethyl) derivatives have been synthesized, and their interaction with brewers' yeast pyruvate decarboxylase was evaluated.The p-tolyl compound was found to be a slow substrate.The
