A convenient synthesis of 1,3-diaryl-1,2,3,4,-tetrahydro-5,7,7-trimethyl-4-oxo-2-thioxo-7H-pyrano[ 2 ,3-d ]pyrimidines

Ahluwalia, V. K.; Kumar, Rakesh; Khurana, A.; Bhatla, Rita

doi:10.1016/s0040-4020(01)90530-7

Cited by 37 publications

(10 citation statements)

References 5 publications

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“…ethanol, methanol and pyridine. However, most of these rely on multi-step reactions and complex synthetic pathways, long reaction times and yields are low [2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid Promoted Efficient and Rapid One-pot Synthesis of Pyran Annulated Heterocyclic Systems

et al. 2005

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Section: Introductionmentioning

confidence: 99%

Ionic Liquid Promoted Efficient and Rapid One-pot Synthesis of Pyran Annulated Heterocyclic Systems

et al. 2005

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“…Pyrano[2,3‐ d ]pyrimidines are annulated uracils, available as key structural units in some natural products such as polyethers, antibiotics, carbohydrates, pheromones, iridoids, and alkaloids. [ 17,18 ] Pyrano[2,3‐ d ]pyrimidines are building blocks of various natural products that are also used as a drug for insomnia treatment. [ 19 ] They also exhibit various biological and pharmacological properties such as antitumor, cardiotonic, antihypertensive, bronchiodilator, antibronchitic, antimicrobial, antihepatotoxicity, antimalarial, analgesic, antiviral, and antifungal activities.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of adenine‐grafted carbon‐modified amorphous ZnO with enhanced catalytic activity

Chowhan

Gupta

Sharma

2020

Applied Organom Chemis

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Sustainability has become a countersign and guiding rule for current field of nanocatalysis. Herein, we report a cost‐effective, greener, clean, and proficient process for the formation of adenine‐grafted carbon‐modified amorphous ZnO nanocatalyst (ZnO@AC) derived from garment industry waste (waste cotton cloth). Due to adenine functionality, catalyst provides consistent dispersion of ZnO providing catalytically active sites for the synthesis of pyrano[2,3‐d]pyrimidines and bis(pyrazol‐5‐ole) and alters the electron–hole pair recombination without notable mass‐transfer limitation. The photocatalytic evaluation of ZnO@AC was performed on methyl orange (MO) dye under UV light and 87.3% degradation efficiency resulted in 75 min. Moreover, the catalyst was recyclable and could be reused up to eight runs, making it more sustainable. The morphology of ZnO@AC remained intact with the slight agglomeration of ZnO nanoparticles (nps) after eight recoveries according to the transmission electron microscopy (TEM) image of the used catalyst.

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“…Consequently, a number of synthetic strategies for the construction pyrano[3,2-c]chromene derivatives have been reported 33–36 . Some of the reported procedures, however, require long reaction times, multi-step reactions, complex synthetic pathways, and affordable products with modest yields 37–43 . In addition, the uses of toxic and expensive transition metals and volatile organic solvents limit the scope of this kind of reaction.…”

Section: Introductionmentioning

confidence: 99%

An efficient and reusable nano catalyst for the synthesis of benzoxanthene and chromene derivatives

Balou

Khalilzadeh

Zareyee

2019

Sci Rep

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Potassium fluoride impregnated on clinoptilolite nanoparticles (KF/CP NPs) was investigated as an efficient solid base catalyst for multicomponent condensation reaction. A broad range of aromatic aldehydes and enolizable compounds were condensed with 2-naphthol or 4-hydroxycumarine. The reaction was carried out under a solvent-free condition to give the corresponding benzoxanthene and pyrano [3,2-c]chromene derivatives in high yields. The low cost and availability of catalyst, novel and green procedure makes this strategy more useful for the preparation of tetrahydrobenzo[a]-xanthene-11-one and pyrano [3,2-c]chromene derivatives.

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A convenient synthesis of 1,3-diaryl-1,2,3,4,-tetrahydro-5,7,7-trimethyl-4-oxo-2-thioxo-7H-pyrano[ 2 ,3-d ]pyrimidines

Cited by 37 publications

References 5 publications

Ionic Liquid Promoted Efficient and Rapid One-pot Synthesis of Pyran Annulated Heterocyclic Systems

Ionic Liquid Promoted Efficient and Rapid One-pot Synthesis of Pyran Annulated Heterocyclic Systems

Fabrication and characterization of adenine‐grafted carbon‐modified amorphous ZnO with enhanced catalytic activity

An efficient and reusable nano catalyst for the synthesis of benzoxanthene and chromene derivatives

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