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Upstream product

• 6093-68-1 6-hydroxycoumarin 
• 105-07-7 4-cyanobenzaldehyde 
• 1076-38-6 4-hydroxy[1]benzopyran-2-one 

Relevant academic research and scientific papers

Synthesis of bis-coumarins over acetic acid functionalized poly(4-vinylpyridinum) bromide (APVPB) as a green and efficient catalyst under solvent-free conditions and their biological activity

Abstract: In this work, acetic acid functionalized poly(4-vinylpyridinum) bromide as a green and reusable catalyst was successfully tested on the synthesis of various bis-coumarins under solvent-free conditions. In addition, antioxidant and anti-inflammat

Synthesis, photophysical properties, chemo-sensing ability and computational studies of biscoumarin derivatives

Synthesis of biscoumarin derivatives using an environment friendly,recyclable polymeric resin as catalyst via one-pot pseudo-three component reaction was simply achieved by using numerous substituted aromatic aldehydes (1 mM) and 4-hydroxycoumarin (2 mM)

Developing a highly potent anthelmintic: study of catalytic application of l-proline derived aminothiourea in rapid synthesis of biscoumarins and their in vitro anthelmintic essay

Abstract: Due to serious side effects of benzimidazoles such as apoptosis and mitotic arrest, development of alternative anthelmintic drugs with comparable efficacy to target the acetylcholine receptors of parasites is considered very important to control

Heterogeneous SO3H@Fe3O4 magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, and 1,8-dioxo-octahydroxanthene derivatives

This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, an

Carbon-SO3H: An efficient catalyst for the synthesis of biscoumarin under ambient reaction conditions and their in silico studies

In this article, we have established a highly promising approach for the synthesis of biscoumarins via domino Knoevenagel–Michael condensation of 4-hydroxycoumarin and aromatic aldehydes in 2:1 ratio using carbon-SO3H as a solid acid catalyst i

The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs): an efficient, green and recyclable nanocatalyst for the synthesis of biscoumarin derivatives under solvent-free conditions

Abstract: The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs) as a novel magnetic nanocatalyst was synthesized and fully characterized. The excellent catalytic activity of HAP/Fe3O4 NPs was investigated in the synthesis of biscoumarin derivatives under mild, green and solvent-free conditions. A series of aromatic (bearing different functional groups), heteroaromatic and aliphatic aldehydes have been converted to biscoumarins with good to excellent isolated yields. The significant advantages offered by the present method in close agreement with green chemistry principles are: catalyst is inexpensive, non-toxic, easy handling and reusable up to six recycle runs, magnetic separation of nanostructured catalyst, simple work-up procedure, short reaction time, high yields of products and using solvent-free conditions. Graphical abstract: [Figure not available: see fulltext.].

Thiamine hydrochloride as a recyclable organocatalyst for the synthesis of bis(indolyl)methanes, tris(indolyl)methanes, 3,3-di(indol-3-yl)indolin-2-ones and biscoumarins

Thiamine hydrochloride was identified as an eco-friendly organocatalyst for the synthesis of a broad range of bis(indolyl)methanes in good to excellent yields. Green chemistry matrix calculations showed high atom economy and a small E-factor for the reaction. Moreover, the simple and easy operational protocol using a small amount of thiamine hydrochloride (1 mol%) makes this procedure an alternative approach for this transformation industrially. This protocol was also extended to the synthesis of naturally occurring alkaloids such as tris(indolyl)methane, arundine, vibrindole A, 3,3-di(indol-3-yl)indolin-2-ones and biscoumarin derivatives.

Trityl bromide versus nano-magnetic catalyst in the synthesis of henna-based xanthenes and bis-coumarins

Abstract: In this work, trityl bromide (TrBr) as a new, efficient, mild and neutral catalyst was used for the synthesis of henna-based xanthenes (aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones) and bis-coumarins by in situ generation of trityl carb

Friedel-Crafts alkylation of 4-hydroxycoumarin over silica-bonded 1,4-diaza-bicyclo[2.2.2] octane-sulfonic acid chloride as nanostructured heterogeneous catalyst

A novel nanostructured heterogeneous catalyst, namely silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride (SBDBSAC), has been synthesized and fully characterized by several techniques, including Fourier transform infrared spectroscopy (FTI

Simple protic ionic liquid [Et3NH][HSO4] as a proficient catalyst for facile synthesis of biscoumarins

Abstract: We have explored a number of protic ionic liquids (PILs) as a catalyst for the synthesis of biscoumarins by condensation of 4-hydroxycoumarin with an aromatic aldehyde. Methylimidazolium- and triethylammonium-based PILs were synthesized by simple neutralization reaction with protic acids. Triethylammonium hydrogen sulfate [Et3NH][HSO4] was found to be the best among the studied PILs concerning the yield of products and reaction time period. Different biscoumarin derivatives were synthesized based on 4-hydroxycoumarin and various substituted aromatic aldehydes at optimum reaction conditions. Obtained products were separated just by simple filtration. The facile method does not require additional purification for formed products. The catalyst has shown better yields along with outstanding recyclability, providing an environmental benign protocol for the synthesis of biscoumarin derivatives. Graphical Abstract: Screening of simple protic ionic liquids as a catalyst in the synthesis of biscoumarins, out of which [Et3NH][HSO4] was found to be best among the studied PILs.