Citric Acid Catalyzed Synthesis of Amidoalkyl Naphthols under Solvent-free Condition: An Eco-friendly Protocol

Shaikh, Kabeer A.; Chaudhar, Uddhav N; Ningdale, Vijaykumar B.

doi:10.9790/5736-07429093

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…Wood ash biocatalyst [63], alginic acid [64,65], boric acid [66], tartaric acid [67,68], citric acid [69][70][71], pectin [72], oxalic acid [73][74][75], saccharin [46,76,77], wool and keratin deriving from wool fibers [78][79][80], feathers [81][82][83][84], silk [85,86], plant derivatives, lemon juice [87,88].…”

Section: Natural Materials and Foods As Catalystsmentioning

confidence: 99%

Green Chemistry in Organic Synthesis: Recent Update on Green Catalytic Approaches in Synthesis of 1,2,4-Thiadiazoles

et al. 2022

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Green (sustainable) chemistry provides a framework for chemists, pharmacists, medicinal chemists and chemical engineers to design processes, protocols and synthetic methodologies to make their contribution to the broad spectrum of global sustainability. Green synthetic conditions, especially catalysis, are the pillar of green chemistry. Green chemistry principles help synthetic chemists overcome the problems of conventional synthesis, such as slow reaction rates, unhealthy solvents and catalysts and the long duration of reaction completion time, and envision solutions by developing environmentally benign catalysts, green solvents, use of microwave and ultrasonic radiations, solvent-free, grinding and chemo-mechanical approaches. 1,2,4-thiadiazole is a privileged structural motif that belongs to the class of nitrogen–sulfur-containing heterocycles with diverse medicinal and pharmaceutical applications. This comprehensive review systemizes types of green solvents, green catalysts, ideal green organic synthesis characteristics and the green synthetic approaches, such as microwave irradiation, ultrasound, ionic liquids, solvent-free, metal-free conditions, green solvents and heterogeneous catalysis to construct different 1,2,4-thiadiazoles scaffolds.

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Section: Natural Materials and Foods As Catalystsmentioning

confidence: 99%

Green Chemistry in Organic Synthesis: Recent Update on Green Catalytic Approaches in Synthesis of 1,2,4-Thiadiazoles

et al. 2022

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“…In additional publications listed in Table 1, entries 42–64, phosphorus pentoxide (P 2 O 5 ) [46], silica-supported phosphorus pentoxide (P 2 O 5 -SiO 2 ) [47], N , N , N ’, N ’-tetrabromobenzene-1,3-disulfonamide (TBBDA) [48], 1-methyl-3-(2-(sulfoxy)ethyl)-1 H -imidazol-3-ium chloride (MSI) [49], succinic acid [50], tannic acid [49], p -nitrobenzoic acid [52], a carbon-based solid acid (CBSA) [53], citric acid [54], sulfanilic acid [55], bismuth(III) nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) [56], 1-hexanesulfonic acid sodium salt [57], zirconyl triflate (ZrO(OTf) 2 ) [58], sulfonated carbon (SO 3 H-carbon) [59], MCM-41- N -propylsulfamic acid [60], polyphosphate ester [61] and amberlite IR-120 [62] were used as catalysts. These latest strategies provide efficient syntheses under mild conditions without using harsh chemicals.…”

Section: Reviewmentioning

confidence: 99%

Mannich base-connected syntheses mediated by ortho-quinone methides

Barta¹,

Fülöp²,

Szatmári³

2018

Beilstein J. Org. Chem.

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This article provides an overview about specifically modified Mannich reactions where the process involves an ortho-quinone methide (o-QM) intermediate. The reactions are classified on the basis of the o-QM source followed by the reactant, e.g., the dienophile partner in cycloaddition reactions (C=C or C=N dienophiles) or by the formation of multicomponent Mannich adducts. Due to the important pharmacological activities of these reactive o-QM intermediates, special attention is paid to the biological activity of these compounds.

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“…28 Despite its great importance, only a few papers have reported on its catalytic application in organic synthesis. [29][30][31][32][33][34][35][36] Green chemistry is an efficient technology that minimizes or preferably eliminates the formation of waste, avoids the use of toxic solvents and reagents and utilizes renewable raw materials as far as possible. 37 The introduction of combinatorial chemistry, which has become almost universally linked with lead compound development, appears in many applications to be contrary to the principles of green chemistry as, once again, the focus is on the desired product with little concern for the overall efficiency of the process with regards to transforming reactants into products with the least possible production of waste.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation

et al. 2016

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Citric Acid Catalyzed Synthesis of Amidoalkyl Naphthols under Solvent-free Condition: An Eco-friendly Protocol

Cited by 11 publications

References 24 publications

Green Chemistry in Organic Synthesis: Recent Update on Green Catalytic Approaches in Synthesis of 1,2,4-Thiadiazoles

Green Chemistry in Organic Synthesis: Recent Update on Green Catalytic Approaches in Synthesis of 1,2,4-Thiadiazoles

Mannich base-connected syntheses mediated by ortho-quinone methides

Synthesis of pyrrolidinone derivatives from aniline, an aldehyde and diethyl acetylenedicarboxylate in an ethanolic citric acid solution under ultrasound irradiation

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