One-Pot Synthesis of Xanthene Derivatives Using Silica Supported [2-(Sulfooxy)ethyl]sulfamic Acid as a Novel and Efficient Catalyst Under Solvent-Free Condition

Abstract

An efficient and simple method for the synthesis of xanthenes derivatives is described via one-pot condensation of various aldehydes and 2-naphthol using [2-(sulfooxy)ethyl]sulfamic acid (SESA) as a novel catalyst. Different types of aromatic aldehydes were used in the reaction and in all cases the products synthesized successfully Use of easily available catalyst, time minimizing, excellent yields, simplicity of the reaction, heterogeneous system, a cleaner reaction and easy workup are the advantages of the present method.

Fe/Co-MOF Nanocatalysts: Greener Chemistry Approach for the Removal of Toxic Metals and Catalytic Applications

“…The flask was then placed in an oil bath and refluxed for 30 min at 70 °C in the presence of 0.03 g of activated (Fe/Co) Bi-MOF nanocatalysts. 41 , 44 , 55 , 56 The formed solid was filtered, washed with water, and dried to give a pure compound. It could be also purified by crystallization from ethanol.…”

“…Then, the flask was placed in an oil bath and refluxed for 2 h at 80 °C in the presence of 0.03 g of activated (Fe/Co) Bi-MOF nanocatalysts. ,, Dibenzoxanthene was synthesized using a mixture of 2 mmol β-naphthol with 1 mmol benzaldehyde in a round flask. The flask was then placed in an oil bath and refluxed for 30 min at 70 °C in the presence of 0.03 g of activated (Fe/Co) Bi-MOF nanocatalysts. ,,, The formed solid was filtered, washed with water, and dried to give a pure compound. It could be also purified by crystallization from ethanol.…”

“…It exhibits a broad spectrum of biological activities (e.g., antibacterial, antiviral, anticancer, antifungal, antitubercular, and anti-inflammatory). − In recent years, the use of recoverable and reusable catalysts has attracted special attention because of their nontoxicity and economic, environmental, and industrial advantages . For instance, xanthene and its derivatives are important because of their wide range of biological and pharmaceutical characterizations and have agricultural bactericidal, antiviral, anti-inflammatory, and antiviral activities. − They have been widely used in dyes, fluorescent materials for the visualization of biomolecules, and laser technologies. However, many of the synthesis methods of these catalysts suffer from one or more disadvantages, such as long reaction times (from 16 h to 5 days), harsh conditions, expensive reagents, use of toxic organic solvents, low product yields, and the need for excess reagents and catalysts.…”

An efficient facile and one-pot synthesis of 2-arylsubstituted benzimidazole derivatives using 1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid as a recyclable and highly efficient ionic liquid catalyst at green condition

“…In continuation of our study in application and characterization of BSA in organic reactions [23][24][25][26][27][28][29][30][31][32][33][34], we recently reported the synthesis of [MOEI]-BSA (Scheme 1) as a novel and efficient solid acid catalyst-promoted green synthesis of quinoxaline derivatives [28].…”