comprising a major proportion of an oil of lubricating viscosity and a minor amount of a silver protective agent comprising the reaction product of a C 5 to C 60 carboxylic acid and at least one amine selected from the group consisting of (1) guanidine, urea, and thioruea compounds; (2)...
1 Workflow for enumeration of amine–acid transformations. For a pair of coupling partners, we consider a reaction at the functional group A (amine) and B (carboxylic acid oxygen, B[O] or carbon, B[C]). Deamination reactions are noted as −A and decarboxylation reactions are noted as ...
载玻片表面修饰羧基(carboxylic acid);羧基修饰生物芯片 羧酸盐(Carboxylate)官能基团载玻片 该载玻片在PH大于4的缓冲液中带负电荷。在使用EDC/NHS活化后,他们可以与具有伯胺基团(primary amine groups)的生物分子共价结合。这种结合比醛-胺结合(aldehide-amine binging)更* 。聚乙二醇(PEG)是可抵抗非* 性吸附的单...
Trimethylsilyl azide-promoted acid-amine coupling: A facile one-pot route to amides from carboxylic acids and amines A versatile and efficient one-pot protocol has been developed for the synthesis of amides from easily accessible carboxylic acids and amines by employing t... Y Tangella,JP Soni,...
amine. CH 3 —CH 2 —NH 2 ethylamine CH 3 —NH—CH 3 dimethylamine CH 3 | CH 3 —N—CH 2 —CH 3 ethyldimethylamine 5 In the IUPAC system, Amines are named as alkanamines. The e in the alkane name of the longest chain is changed to amine. The chain is numbered to locate the...
The reaction with aldehyde is the one of most concern: RCOH+12O2=RCOOH Since catalysts may promote the oxidation of aldehydes, the presence of carboxylic acid may be a concern for exhaust components downstream of a catalyst. View chapterExplore book Carboxylic Acids Robert J. Ouellette, J. ...
Degradable aliphatic polyesters such as poly(lactic acid) are widely used in biomedical applications, however, they lack functional moieties along the polymer backbone that are amenable for functionalization reactions or could be the basis for interactions with biological systems. Here we present a strai...
reaction (Fig.2a). Under the standard conditions, methyl phenylacetate failed to afford any α-amination product, which was in a stark contrast with the productive PAA substrate, supporting the notion that the carboxylic acid functional group is important for the mechanism. Moreover, whenN-...
Various N-protected amino acids were successfully coupled with amino acid esters. Without additives, racemization could not fully be suppressed but remained below 10%, which is a good basis for dedicated optimization. Mechanistic considerations. The reaction mechanism was investigated by in situ nuclear...
The present invention further provides a process for the amidation of a carboxylic acid, characterized in that the carboxyl group of a carboxylic acid or amino group of an amine is activated, and the activated acid is reacted with an amine in case the carboxyl group containing compound has bee...