Decarboxylation of a Wide Range of Amino Acids with Electrogenerated Hypobromite
作者:Roman Matthessen、Laurens Claes、Jan Fransaer、Koen Binnemans、Dirk E. De Vos
DOI:10.1002/ejoc.201403112
日期:2014.10
Bromide-assisted electrochemical decarboxylation efficiently produces valuable nitriles in high yields from a wide range of naturally occurring aminoacids in a single step. Bromide salts are used as both redox mediators and supporting electrolytes in a simple one-compartment setup. As demonstrated for lysine, the selectivity of the decarboxylation can be tuned towards nitriles, amines or amides.
Bio-Based Nitriles from the Heterogeneously Catalyzed Oxidative Decarboxylation of Amino Acids
作者:Laurens Claes、Roman Matthessen、Ine Rombouts、Ivo Stassen、Trees De Baerdemaeker、Diederik Depla、Jan A. Delcour、Bert Lagrain、Dirk E. De Vos
DOI:10.1002/cssc.201402801
日期:2015.1
The oxidativedecarboxylation of aminoacids to nitriles was achieved in aqueous solution by in situ halide oxidation using catalytic amounts of tungstate exchanged on a [Ni,Al] layered double hydroxide (LDH), NH4Br, and H2O2 as the terminal oxidant. Both halide oxidation and oxidativedecarboxylation were facilitated by proximity effects between the reactants and the LDH catalyst. A wide range of
在水溶液中,通过催化卤化原位卤化物,使用在[Ni,Al]层状双氢氧化物(LDH),NH 4 Br和H 2 O 2上交换的钨酸盐,将氨基酸氧化成腈作为末端氧化剂。反应物和LDH催化剂之间的邻近效应促进了卤化物的氧化和氧化的脱羧。各种氨基酸的转化率很高,通常> 90%。腈的选择性非常好,经过适当的中和后,该体系可与酰胺,醇,特别是羧酸,胺和胍官能团相容。这种非均相催化系统已成功应用于将淀粉工业中富含蛋白质的副产物转化为有用的生物基含氮化学品。
Chloraminometric reactions: kinetics and mechanisms of oxidations of amino-acids by sodium N-chlorotoluene-p-sulphonamide in acid and alkaline media
作者:Basavalinganadoddy Thimme Gowda、Darndinasivara S. Mahadevappa
DOI:10.1039/p29830000323
日期:——
data on the kinetics of oxidations of amino-acids by sodium N-chloro toluene-p-sulphonamide (chloramine T) in acid and alkalinemedia have been critically examined. General mechanisms have been proposed for both acid and alkaline medium oxidations. The oxidation process in acidmedia has been shown to proceed via two paths, one involving the direct interaction of N-chlorotoluene-p-sulphonamide (RNHCl)
3-Cyanopropionamide is produced by adding hydrocyanic acid on acrylamide in the presence of an aprotic organic solvent and an alkali metal cyanide at a temperature between 20.degree. and 150.degree. C. 3-cyanopropionamide is an important intermediate product for the production of pyrrolidone or 4-aminobutyramide.