Polymer Supported Reagents: Facile Synthesis of β-Oxalkyl (Acetonyl) Esters of Carboxylic Acids.
摘要:
beta-Oxoalkyl (acetonyl) esters have been synthesised in high yields and in a state of purity by reaction of chloroacetone with insoluble polymer supported carboxylate ions at room temperature.
Microwave-Enhanced Coupling of Carboxylic Acids with Liquid Ketones and Cyclic Ethers Using Tetrabutylammonium Iodide/<i>t</i>-Butyl Hydroperoxide
作者:Pablo Macías-Benítez、F. Javier Moreno-Dorado、Francisco M. Guerra
DOI:10.1021/acs.joc.0c00519
日期:2020.5.1
The oxidative coupling of carboxylic acids with liquid ketones and cyclic ethers has been accomplished in minutes using t-butylhydroperoxide in the presence of tetrabutylammonium iodide under microwave irradiation in the absence of a solvent. In addition to drastically shortening the reaction times, the use of microwaves resulted, in general, in yields equal to or higher than those obtained by conventional
Oxidative C–H Acyloxylation of Acetone with Carboxylic Acids under Iodine Catalysis
作者:Xiao-Yu Zhou、Xia Chen
DOI:10.1055/a-1336-5720
日期:2021.5
Iodine-catalyzed oxidative C(sp3)–H acyloxylation of acetone with carboxylic acids has been developed. The method employs iodide as catalyst and sodium chlorite as oxidant. Substituted benzoic acids, naphthoic acids and heteroaromatic carboxylic acids can be used, and 2-oxopropyl carboxylates are obtained with good to excellent yields.
The KI-catalyzed reaction of acetone with aromatic carboxylic acids is achieved, leading to α-acyloxycarbonyl compounds in good to excellent yields under mild reaction conditions. The present method exhibits good functional-group compatibility. Notably, this reaction system is even suitable for cinnamic acid, 3-phenylpropiolic acid and 4-phenylbutanoic acid. A kinetic isotope effect (KIE) study indicates
TBAI/TBHP mediatedoxidativecrosscoupling of phenols and carboxylic acids with ketones has been reported under metal-free, base free, solvent free conditions enabling environmentally benign synthesis of aryloxyketones, acyloxy ketones and benzofurans. Phenoxyketones and acyloxylcarbonyl compounds were synthesized in good to high yields, where as benzofurans were synthesized in moderate yields. This
[EN] INHIBITORS OF CYSTEINE PROTEASES AND METHODS OF USE THEREOF<br/>[FR] INHIBITEURS DE CYSTÉINE PROTÉASES ET LEURS PROCÉDÉS D'UTILISATION
申请人:PARDES BIOSCIENCES INC
公开号:WO2021252644A1
公开(公告)日:2021-12-16
The disclosure provides compounds of formula II with warheads and their use in treating medical diseases or disorders, such as viral infections. Pharmaceutical compositions and methods of making various compounds with warheads are provided. The compounds are contemplated to inhibit proteases, such as the 3C, CL- or 3CL-like protease. Formula II