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Upstream product

• 1076-38-6 4-hydroxy[1]benzopyran-2-one 
• 104-88-1 4-chlorobenzaldehyde 
• 126-81-8 dimedone 

Relevant academic research and scientific papers

Efficient and highly selective production of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-diones using a mesoporous silica-based nanocatalyst

Abstract: An efficient and highly selective protocol for the production of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives has been developed. The one-pot multi-component condensation of arylaldehydes with 4-hydroxycoumarin and dimedone

Method for catalytically synthesizing dihydro-chromene [4, 3-b] benzopyrone by aid of easily degradable ionic liquid

The invention discloses a method for catalytically synthesizing dihydro-chromene [4, 3-b] benzopyrone by the aid of easily degradable ionic liquid, and belongs to the technical field of organic chemical synthesis. The method includes that a molar ratio of

Selective synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9/f)-dione using copper oxide nanoparticles for potential inhibitors of β-ketoacyl-[acyl-carrier-protein] synthase III of Mycobacterium tuberculosis

A simple and selective synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives has been investigated by multicomponent reaction of aromatic aldehydes, 4-hydroxycoumarin and dimedone using copper oxide nanoparticles. All the synthesi

Heterogeneous ditopic ZnFe2O4 catalyzed synthesis of 4H-pyrans: Further conversion to 1,4-DHPs and report of functional group interconversion from amide to ester

Highly stable, environmentally benign ZnFe2O4 nanopowder was prepared, characterized and applied in the one-pot, three-component synthesis of 4H-pyrans in water. The ZnFe2O 4 catalyst provides both acidic (Fesu

An efficient and rapid access to the synthesis of tetrahydrochromeno[4,3-b]chromene-6,8-dione derivatives by magnesium perchlorate

Arapid and green procedure has been introduced for the preparation of tetrahydrochromeno[4,3-b]chromene-6,8-dione derivatives in the presence of magnesium perchlorate. This solvent-free procedure offers some advantages such as short reaction times, high y

Fe(DS)3, an efficient Lewis acid-surfactant-combined catalyst (LASC) for the one pot synthesis of chromeno[4,3-b]chromene derivatives by assembling the basic building blocks

A highly efficient multicomponent heteroannulation protocol for the synthesis of a library of chromeno[4,3-b]chromene derivative has been developed by applying a Lewis acid-surfactant-combined catalyst (LASC) [Fe(DS) 3]. The LASC converted the initially floating reaction mass into a homogeneous mixture, which on stirring became a turbid emulsion of colloidal aggregates. The shape and size of the colloidal aggregates are confirmed by optical microscopy and DLS. The aqueous reaction medium, dual role of the catalyst in aqueous media, easy recovery of the catalyst, and high yield make the protocol attractive, sustainable, and economical.

Efficient one-pot synthesis of tetrahydrobenzo[c]xanthene-1,11-dione derivatives under microwave irradiation

An efficient one-pot condensation of 4-hydroxylcoumarin, aromatic aldehydes, and 5,5-dimethylcyclohexane-1,3-dione has been achieved with molecular iodine as a catalyst via conventional heating and microwave irradiation techniques, and thus a variety of n

A novel sulfonic acid functionalized ionic liquid catalyzed multicomponent synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives in water

Three-component reactions of 4-hydroxycoumarin, aldehydes, and cyclic 1,3-dicarbonyl compounds were prompted by novel sulfonic acid functionalized ionic liquids 1,3-dimethyl-2-oxo-1,3-bis(4-sulfobutyl)imidazolidine-1,3-diium hydrogen sulfate ([DMDBSI]·2HS