Syntheses of α-Hydroxyamino Acids from α-Keto Acids
作者:Afzal Ahmad
DOI:10.1246/bcsj.47.1819
日期:1974.7
A new general method for the synthesis of α-hydroxyamino acids has been developed. Lithium cyanohydridoborate reduces α-keto acid oximes to the corresponding α-hydroxyamino acids and not to the corresponding α-amino acids.
Enol tautomers of malonic and methylmalonic acids as intermediates in nitrosation
作者:Alan Graham、D. Lyn H. Williams
DOI:10.1039/c39910000407
日期:——
At relatively high acid concentration in the presence of bromide ion catalyst, nitrosation of both malonic and methylmalonic acids involves rate-limiting enolisation of the carboxylic acids.
在溴离子催化剂存在下,在较高的酸浓度下,丙二酸和甲基丙二酸的亚硝化都涉及羧酸的限速烯醇化。
METAL PRECURSOR AND METAL PRECURSOR INK USING THE SAME
申请人:PESOLVE CO., LTD.
公开号:US20150336878A1
公开(公告)日:2015-11-26
Provided are a metal precursor containing an oxime group, which is represented by general formula 1, and a metal precursor ink containing same. The metal precursor ink according to the present invention enhance metal content, induce intramolecular and/or intermolecular complexation, thereby enabling low temperature sintering with excellent solubility and stability. The metal precursor ink according to the present invention can be used to form a metal wire with a desired shape. Therefore, the metal precursor ink can find applications in the field of printed electronics, particularly various electrodes, such as mesh type transparent electrodes.
Application of the Ugi Multicomponent Reaction in the Synthesis of Reactivators of Nerve Agent Inhibited Acetylcholinesterase
作者:Martijn C. de Koning、Marloes J. A. Joosen、Franz Worek、Florian Nachon、Marco van Grol、Steven D. Klaassen、Duurt P. W. Alkema、Timo Wille、Hans M. de Bruijn
DOI:10.1021/acs.jmedchem.7b01083
日期:2017.11.22
form a product that links a reactivating unit and a potential peripheral site ligand. A small library of imidazole and imidazolium reactivators was successfully synthesized using this method. Some of these compounds showed a promising ability to reactivate AChE inhibited by various types of CWA in vitro. Molecular modeling was used to understand differences in reactivation potential between these compounds
α-amino acids was performed in aqueous media by Cr(II) complexes of natural amino acids. The reduction of oximes of α-ketophenylacetic, α-keto-β-phenylpropionic and α-ketopropionic acids proceeded up to >90% conversion and 2–30% enantiomeric excess. 1:2 complexes of Cr(II) with l-alanine, l-valine, l-aspartic acid, l-histidine and l-phenylalanine were used as reducing agents. The reduction of α-(oximino)phenylacetic