Various carboxylic acids are converted to their corresponding N-methoxy- N-methyl amides through the mixed anhydride formed by their reaction with pivaloyl chloridedoi:10.1080/00397919908085946Raghuram, T.Vijaysaradhi, S.Singh, IndrapalSingh, Jaimala...
For example, we used 62% TFA to cleave peptide 5 from resin and to remove the acid-labile protecting groups (Fig. 18). Surprisingly, we noted backbone amide cleavage next to the thioamide bond (thioamide substitution at i + 1 position of β-turn), which results from the nucleophilic ...
Hydrolysis of lysergamide to lysergic acid by …:水解为麦角酸的麦角酰胺…酰胺,麦角,to,acid,麦角酸,麦角酰,acid,麦角酸,为麦角酸的,麦角酰胺 文档格式: .pdf 文档大小: 90.92K 文档页数: 4页 顶/踩数: 0/0 收藏人数: 1 评论次数: 0 文档热度: ...
Borane-amine complexes provide an unusually fast and selective reduction of a deoxynucleoside N-acyl group to a corresponding N-alkyl group. Three different nucleosides (dG, dA, and dC) each having one of three N-protecting groups (benzoyl, isobutyryl, or acetyl) were used to prepare N-alkyla...
The method demonstrates a wide array of substrates, including amides with typical H/alkyl/aryl substitutions, N,N-disubstituted amides, amides derived from alkyl, aryl, or vinyl carboxylic acids, and even amino acid substrates with stereocentres. Furthermore, we have shown the effectiveness of ...
Lewis acid-catalyzed tandem Diels-Alder reaction/retro-Claisen rearrangement as an equivalent of the inverse electron demand hetero Diels-Alder reaction. J. Org. Chem. 70, 6680–6684 (2005). Article CAS PubMed Google Scholar Marenich, A. V., Cramer, C. J. & Truhlar, D. G. Universal ...
LSAstands for Lysergic Acid Amide (alkaloid with a chemical structure similar to LSD) Suggest new definition This definition appears frequently and is found in the following Acronym Finder categories: Science, medicine, engineering, etc. See otherdefinitions of LSA ...
本文分别采用内表面氨基化修饰和硅烷化的方法改性SBA-15表面的性质,以浆态浸渍法和满孔浸渍法制备Co/SBA-15催化剂;以KIT-6为载体,制备不同钴负载量的钴基催化剂。 3) amino acid modification 氨基酸化学修饰 4) amine modification 氨基修饰 例句>>
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 ...
by activation of carboxylic acids through conversion to acid chlorides followed by reaction with amines, or continuous removal of the condensate throughout the reaction in order to drive it to completion. Both of these methods purposefully minimise the reverse reaction with the aim of maximising ...