AbstractA one‐pot oxidative transformation of aldehydes into hydroxamic acids by the use of an aqueous solution of hydroxylamine is reported. The methodology gives high yields and makes use of cheap, abundant and easily available reagents.magnified image
<i>N</i>-[2,2-Dimethyl-3-(<i>N</i>-(4-cyanobenzoyl)amino)nonanoyl]-<scp>l</scp>-phenylalanine Ethyl Ester as a Stable Ester-Type Inhibitor of Chymotrypsin-like Serine Proteases: Structural Requirements for Potent Inhibition of <i>α</i>-Chymotrypsin
We introduce a new potent inhibitor, N-[2, 2-dimethyl-3-(N-(4-cyanobenzoyl)amino)nonanoyl]-L-phenylalanine ethylester (3), which preferentially inhibits serine proteases belonging to a chymotrypsin superfamily. This inhibitor, despite consisting of a stable ethylester structure, showed strong inhibitory activities toward bovine alpha-chymotrypsin, human cathepsin G, and porcine elastase by acting
<i>N</i>-Hydroxysuccinimide-promoted Oxidation of Primary Alcohols and Aldehydes to Form Active Esters with Hypervalent(III) Iodine
作者:Naiwei Wang、Renhua Liu、Qing Xu、Xinmiao Liang
DOI:10.1246/cl.2006.566
日期:2006.6
A simple, mild, and efficient method for the conversion of primary alcohols and aldehydes to N-hydroxysuccinimide esters with (diacetoxyiodo)benzene in high yield is developed. N-Hydroxysuccinimide acts not only as an esterification partner but also as an activator of PhI(OAc)2 in this reaction.
An efficient method to prepare amides by a cascade strategy was developed. Using nBu4NI or NaI as the catalyst and tert-butyl hydroperoxide as the oxidant, various alcohols reacted with N-hydroxysuccinimide or N-hydroxyphthalimide affording corresponding active esters in moderate to good yield. The resulting active esters were converted into amides smoothly in one pot.
开发了一种通过级联策略制备酰胺的有效方法。使用n Bu 4 NI或NaI作为催化剂,氢过氧化叔丁基作为氧化剂,各种醇与N-羟基琥珀酰亚胺或N-羟基邻苯二甲酰亚胺反应,以中等至良好的产率提供相应的活性酯。在一锅中将所得的活性酯平稳地转化为酰胺。
IBX-Mediated Conversion of Primary Alcohols and Aldehydes toN-Hydroxysuccinimide Esters
作者:Agnes Schulze、Athanassios Giannis
DOI:10.1002/adsc.200303195
日期:2004.2
Recently, the use of the hypervalent iodine reagent 1-hydroxy-1,2-benziodoxol-3(1H)-one 1-oxide (IBX) for the oxidation of primary alcohols and aldehydes to carboxylic acids was described. During the synthesis of these carboxylic acids the corresponding N-hydroxysuccinimide esters were formed as intermediate products, but their isolation as main reaction products was not successful. We report herein
Metal-free intermolecular C–O cross-coupling reactions: synthesis of N-hydroxyimide esters
作者:Yunhe Lv、Kai Sun、Weiya Pu、Shukuan Mao、Gang Li、Jiejie Niu、Qian Chen、Tingting Wang
DOI:10.1039/c6ra22653a
日期:——
Selectfluor-mediated intermolecular C–O crosscouplingreaction for the synthesis of N-hydroxyimide esters was developed for the first time. The reaction is applicable to the coupling of readily available aryl and alkyl aldehydes with N-hydroxyphthalimide (NHPI) and N-hydroxysuccinimide (NHSI). The resulting active esters can be directly converted into amides in onepot.