The present methodology illustrates the efficient acetylation of primary amines and amino acids in brine solution by means of acetyl chloride under weakly basic condition in the presence of sodium acetate and/or triethyl amine followed by trituration with aqueous saturated bicarbonate solution. This ...
The reaction of aliphatic polyamine and epoxy resin is by active amino hydrogen, and theoretically each active hydrogen atom on amino nitrogen atoms can open one epoxy group, so it has the following stoichiometric relationship. (3.2)Theamountofaminephr=Amineequivalent×Epoxyvalue ...
amine (redirected fromPrimary amines) Thesaurus Medical Encyclopedia Related to Primary amines:Amino functional group a·mine (ə-mēn′, ăm′ēn) n. Any of a group of organic compounds of nitrogen, such as ethylamine, C2H5NH2, that may be considered ammonia derivatives in which one or mor...
In the past few years, primary amine catalysts derived from natural amino acids, Cinchonaalkaloids and other chiral amines have emerged as readily available, highly versatile and extremely powerful catalysts in asymmetric synthesis. They have been demonstrated to be effective catalysts in a wide range...
per dialysate whereas a Coomassie blue assay measured 1.19±0.78 g. The CBQCA assay values were substantially higher than previously reported amino acid losses. The CBQCA fluorescent assay for amines provides a simple assay for quantifying primary amine losses in dialysate fluid. 展开 关键词:...
A method for the preparation of primary amines with a to an aliphatic or cycloaliphatic c - atom bound primary amino group and a cyclopropyl - unit (amine ... PTTER, HERMANN, DR., NEUSTADT, DE,GRIESBACH, ULRICH, DR., MANNHEIM, DE,WINSEL, HARALD, DR., BIRKENHEIDE, DE ...
A flask was charged with primary amine (10 mmol), paraformaldehyde (4a, 20 mmol) and oxalic acid dihydrate (5a, 0.1 mol) and briefly flushed with nitrogen. In the case of secondary amines, 10 mmol of 4a and 50 mmol of 5a were used. For amines with multiple amino functions, ...
the fluorometric or electrochemical assaying of low levels of primary amines and more particularly, biogenic and endogenous amines such as catechol amines, amino acids, and peptides, by reacting a substituted or unsubstituted naphthalene-2-3-dicarboxyaldehyde with the non-fluorescing primary amine of...
A primary aliphatic amine is defined as an organic compound that reacts with nitrous acid to liberate nitrogen and form an alcohol. It is an important analytical tool in studying proteins and amino acids due to its ability to determine free primary amino groups. ...
Scheme 1.6Primary amine-thiourea bifunctional catalyst 5 and 6-catalyzed Michael addition of ketones2006 年,Jacobsen 小组系统地研究了伯胺-硫脲双官能团催化剂 7 催化的链状酮与硝基烯化合物的不对称 Michael 加成反应[39],结果表明反应底物的适用性很好, 而且非对映选择性(up to 20 : 1 dr) 和对映选择性...