497-23-4Relevant articles and documents
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Stenberg,Perkin
, p. 323 (1963)
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Oxidation of Diols to Lactones by Nocardia corallina B-276
Luna, Hector,Prasad, Kapa,Repic, Oljan
, p. 303 - 306 (1994)
Several synthetically useful achiral and chiral lactones with high optical purity were prepared by whole-cell oxidation of diols with Nocardia corallina.The absolute stereochemistry of the newly created stereogenic centers was established by comparison with known compounds.In all cases the products were derived fron the oxidation of the pro-S hydroxymethylene group.
Reactions of complex ligands Part 91. Application of ring closing metathesis to Fischer-type carbene complexes: Synthesis and structure of medium-sized chromium oxacycloalkenylidenes
Sültemeyer, Jan,D?tz, Karl Heinz,Hupfer, Heike,Nieger, Martin
, p. 26 - 36 (2000)
Six- and seven-membered pentacarbonyl(2-oxacycloalkenylidene) chromium complexes 17 and 6 have been synthesized in moderate to good yields from alkenyloxy(methyl)carbene complex precursors applying an α-alkylation/ruthenium based ring closing metathesis sequence. The ring-closure is hampered for β-alkylated vinylcarbene complexes which may undergo competing intermolecular cross metathesis at the alkenyloxy terminus in low yield.
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Judge,Price
, p. 435,442 (1959)
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No-D NMR (No-Deuterium Proton NMR) spectroscopy: A simple yet powerful method for analyzing reaction and reagent solutions
Hoye, Thomas R.,Eklov, Brian M.,Ryba, Troy D.,Voloshin, Mikhail,Yao, Letitia J.
, p. 953 - 956 (2004)
(Equation presented) The title technique is a convenient and powerful method for directly monitoring or assaying any reaction mixture or reagent solution. Examples of some common processes (Fischer esterification, lithiation, butyllithium/THF compatibility, olefin metathesis, and a quantification assay), each interrogated in its native solvent, are presented. The spectral data are easy to acquire, and the information content makes a compelling case for routine use of No-D NMR spectroscopy.
Characteristic flavor formation of thermally processed N-(1-deoxy-α-D-ribulos-1-yl)-glycine: Decisive role of additional amino acids and promotional effect of glyoxal
Zhan, Huan,Cui, Heping,Yu, Junhe,Hayat, Khizar,Wu, Xian,Zhang, Xiaoming,Ho, Chi-Tang
, (2021/09/28)
The role of amino acids and α-dicarbonyls in the flavor formation of Amadori rearrangement product (ARP) during thermal processing was investigated. Comparisons of the volatile compounds and their concentrations when N-(1-deoxy-α-D-ribulos-1-yl)-glycine r
The effect of Br- and alkali in enhancing the oxidation of furfural to maleic acid with hydrogen peroxide
Yang, Tao,Li, Wenzhi,Ogunbiyi, Ajibola T.
, (2021/03/06)
This study was focused on investigating a novel catalytic system for the selective conversion of furfural to maleic acid (MA) in an aqueous system with hydrogen peroxide as an oxidant. A series of experiments that study the impacts of catalyst species, furfural concentration, catalyst dosage, reaction temperature, residue time, hydrogen peroxide concentration, excess water content, and solvent types on the oxidation of furfural to MA was carried out. The results showed that the co-existence of Br- and alkali sites might play a vital role in furfural oxidation, which could improve the MA yield remarkably. Under 90 °C for 3 h, 72.4 % MA yield was obtained with KOH and KBr as co-catalyst in an aqueous phase. Moreover, a possible reaction pathway of furfural oxidation was proposed on the basis of our reaction system.
Chiral Bicyclic Imidazole-Catalyzed Acylative Dynamic Kinetic Resolution for the Synthesis of Chiral Phthalidyl Esters
Zhou, Muxing,Gridneva, Tatiana,Zhang, Zhenfeng,He, Ende,Liu, Yangang,Zhang, Wanbin
supporting information, p. 1641 - 1645 (2020/11/30)
Utilizing a chiral bicyclic imidazole organocatalyst and adopting a continuous injection process, an alternative route has been developed for the efficient synthesis of chiral phthalidyl ester prodrugs via dynamic kinetic resolution of 3-hydroxyphthalides through enantioselective acylation (up to 99 % ee). The computational studies suggest a general base catalytic mechanism differing from the widely accepted nucleophilic catalytic mechanism. The structure analysis of the key transition states shows that the CH-π interactions and not the previously considered cation/π-π interactions between the catalyst and substrate is the dominant factor giving rise to the observed stereocontrol.
