نتایج جستجو برای: aromatic carboxylic acid
تعداد نتایج: 781037 فیلتر نتایج به سال:
سنتز پلیمرهای کوئوردیناسیونی جدید از لیگاندهای 2-آمینو نیکوتینیک اسید، 2-کینولین کربوکسیلیک اسید، 2-پیرازین کربوکسیلیک اسید در ابعاد توده، با روش گرایان دمایی و با استفاده از شاخه ی جانبی انجام شده است، این پلیمرها توسط روش طیف سنجی ir شناسایی و پایداری گرمایی آن ها توسط تجزیه های وزن سنجی حرارتی (tga) و تجزیه ی گرمایی تفاضلی (dta) بررسی شده است. در ادامه، ساختار این ترکیبات توسط بلورنگاری پرتو...
Some new mono-and bis-polycyclic aromatic spiro-beta-lactams and bis-non spiro-polycyclic aromatic beta-lactams have been synthesized from imines derived from anthracene-9-carbaldehyde, 2-naphtaldehyde and a ketene derived from 9H-xanthene-9-carboxylic acid and phenoxyacetic acid by a [2+2] cycloaddition reaction. The cycloadducts were characterized by spectral data, including 1H-NMR, 13C-NMR, ...
Various monoand disubstituted cinnamic acid derivatives and aromatic carboxylic acids with saturated side chains were incubated mainly with Bacillus, Candida, Hansenula, and Saccharo m yces strains. The cinnamic acids carrying a hydroxyand/or a methoxy group at the 3and/or 4-position of the benzene ring were decarboxylated with high yields. Most of the reactions were terminated within 24 to 48...
Abstract Aromatic carboxylic acids are prone to decarboxylate in high-temperature water (HTW). While the decarboxylation kinetics of several aromatic have been explored, studies on their compatibility with organic syntheses HTW scarce. Herein, we report hydrothermal synthesis (HTS) 2,3-diarylquinoxaline from 1,2-diarylketones and 3,4-diaminobenzoic acid. A detailed study reaction parameters was...
The dehydrogenative coupling of aromatic amides with dimethyl itaconate proceeds smoothly under rhodium catalysis through ortho C−H bond cleavage directed by their amide group to produce benzylidenesuccinates. Aromatic carboxylic acids including benzoic and phthalic also couple the give 1 : 2 products predominantly. Benzylidenesuccinic acid derivatives have been known show various biological ac...
In this study, a quinoline-4-carboxylic acid derivative was synthesized through Pfitzinger reaction. reaction, isatin is modified via its reaction with ketone and refluxed for 24 h to obtain acid. The presence of carboxylic group identified by Fourier Transform Infrared (FTIR) spectroscopy ultraviolet–visible (UV-Vis) spectrophotometry. results showed that the absorption peaks C=O O–H stretchin...
Some new biphenyl-4-carboxylic acid 5-(arylidene)-2-(aryl)-4-oxothiazolidin-3-yl amides have been synthesized and evaluated for anti-inflammatory activity. Biphenyl-4-carboxylic acid hydrazide was converted to the corresponding aryl hydrazones using aryl aldehydes in the presence of catalytic amount of glacial acetic acid. The aryl hydrazones on reaction with thioglycolic acid in the presence o...
We present the characterisation of a hydrogel forming family of benzene 1,3,5-tricarboxamide (BTA) aromatic carboxylic acid derivatives. The simple, easy to synthesise compounds presented here exhibit consistent gel formation at low concentrations through the use of a pH trigger.
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