Infrared and nuclear magnetic resonance properties of benzoyl derivatives of five-membered monoheterocycles and determination of aromaticity indices
作者:Kyu Ok Jeon、Jung Ho Jun、Ji Sook Yu、Chang Kiu Lee
DOI:10.1002/jhet.5570400504
日期:2003.9
Benzophenones, 2-benzoylthiophenes, 2-benzoylpyrroles, and 2-benzoylfurans, which have substituents at m- and p-positions of the benzoyl ring were prepared and their ir and nmr spectra were obtained in 0.1 M chloroform-d solution. The chemical shift values of each series were plotted against the Hammett substituent parameters to give good correlation, with the exception of the ortho-Hs and -Cs. The
A new reagent 2-(trifluoromethylsulfonyloxy)pyridine (TFOP) was prepared by the reaction of sodium salt of 2-pyridinol with trifluoromethylsulfonyl chloride in dioxane. The compound TFOP in trifluoroacetic acid has been found to intermolecularly dehydrate from benzoic acid and aromatic hydrocarbons to give the corresponding benzophenones in high yield. It was further elucidated, in the reaction of
Some new oximinoalkanoic (n = 2,3,4) esters and acids derived from methoxyphenylthienyl ketones have been synthesized and evaluated in vitro for their inhibitory effects on arachidonic acid‐induced human platelet aggregation. Of the eighteen oximinoethers tested the most active derivatives, which were four times more active as aspirin, belonged to the para methoxy series with Z configuration and n
已经合成了一些新的肟基链烷酸 (n = 2,3,4) 酯和酸,这些酯和酸源自甲氧基苯基噻吩基酮,并在体外评估了它们对花生四烯酸诱导的人血小板聚集的抑制作用。在测试的十八种肟基醚中,活性最高的衍生物是阿司匹林的四倍,属于 Z 构型且 n = 2 或 3 的对甲氧基系列。
[EN] A ONE STEP SYNTHESIS OF 2-SUBSTITUTED BENZO[B]THIOPHENES<br/>[FR] SYNTHÈSE EN UNE ÉTAPE DE BENZO[B]THIOPHÈNES SUBSTITUÉS EN POSITION 2
申请人:INDIAN INST TECH MADRAS
公开号:WO2021038581A1
公开(公告)日:2021-03-04
The invention pertains to a one step synthesis of 2-substituted benzo[b]thiophene of general formula wherein the synthesis of 2-substituted benzo[b]thiophenes is by reacting the starting materials substituted or unsubstituted 2-halogenobenzaldehyde and substituted or unsubstituted acetyl/phenacyl bromide with a catalyst, a sulphur source and phase transfer catalyst in an aqueous medium with atmospheric air and at temperature in the range of 25°C-30°C.