Acid-base catalyzed reaction 酸碱催化反应 Activating group 活化基团 Acyl cation 酰[基]正离子 Acyl rearrangement 酰基重排 Acylation 酰化 Acyloin condensation 偶姻缩合 Acylolysis,acyl cleavage 酰基裂解 acyloxyation 酰氧基化 Addition-elimination mechanism 加成消除机理 Additive dimerization 加成二聚 Alcoholysis...
1B). However, these approaches have not been widely adopted, due to limitations in scale, substrate scopes, efficiency, toxicity, and sustainability. Enzymatic amide synthesis is promising10, but so far this is limited to ligase enzymes that couple a narrow range of amines with carboxylic acid ...
methylimidazolium hexafluorophosphate [BMI-PF6], and 1-n-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [BMI-NTf2]} as efficient supports for Lewis and Brnsted acids ,which are promoters of the aminolysis of some esters, fatty acids, and fatty acid esters (among others) to form ...
Here, a novel approach was devised to convert amides into esters without the use of transition metals. The method effectively overcomes the inherent low reactivity of amides by employing dimethylsulfate-mediated reaction to activate the C-N bonds. To confirm the proposed reaction mechanism, control ...
β-Hydroxy alkylamide reacts with carboxylic acid to form an ester much faster than with a normal alcohol. Many suggestions have been made to describe the mechanism of this reaction, but none of them have been proved. It is clear that this reaction cannot be seen as a normal esterification...
Here, a novel approach was devised to convert amides into esters without the use of transition metals. The method effectively overcomes the inherent low reactivity of amides by employing dimethylsulfate-mediated reaction to activate the C-N bonds. To confirm the proposed reaction mechanism, control ...
Why it is necessary to be careful when working with barium chloride dihydrare? Why is it important to store cyclopentadiene below -50 degrees C? Use a rxn mechanism to explain the answer. What is the purpose of the concentrated sulfuric acid in Pinacol rearrangement?
β-Hydroxy alkylamide reacts with carboxylic acid to form an ester much faster than with a normal alcohol. Many suggestions have been made to describe …[ Dirk StanssensRalph HermannsHerman Wories]Progress in Organic CoatingsStanssens, D., Hermanns, R., and Wories, H., On the mechanism ...
and assigned to a carboxylic acid carbon, the difference in shift (5 p.p.m.) between this resonance and the carbonyl amide carbon (169 p.p.m.) being typical18. This indicates that there are either unreacted MTAB molecules trapped in the pores of CAF-2 or that there is a significant ...
2.7.2.3.2 From carboxylic acid amides and acylating reagents Primary and secondary amides and thioamides react with alkyl chloroformates with loss of CO2 or COS, forming iminium chlorides (82; equation 52). In some cases this method is complementary to the Pinner imido ester hydrochloride synthes...