Graphene oxide mediated solvent-free three component reaction for the synthesis of 1-amidoalkyl-2-naphthols and 1,2-dihydro-1-arylnaphth[1,2- e ][1,3]oxazin-3-ones

Monometallic and bimetallic Cu–Ag MOF/MCM-41 composites: structural characterization and catalytic activity

“…In comparison with other literatures; 1-amido alkyl-2naphthol was obtained under solvent free conditions with a yield of 88% aer 20 min using graphene oxide as a catalyst at 120 C, 86% aer 75 min using Ba 3 (PO 4 ) 2 catalyst at 100 C and 90% aer 25 min using sulfonated polynaphthalene at 80 C. 45,87,88 A possible mechanism for the synthesis of 1-amidoalkyl-2naphthol was suggested in Scheme 1, based on the literature. 89 The reaction of benzaldehyde with b-naphthol in the presence of MOF catalyst produces ortho-quinone methides (o-QMs) which reacted with benzamide via conjugated addition on the a,b-unsaturated carbonyl group to yield 1amidoalkyl-2-naphthol.…”

Study and application of graphene oxide in the synthesis of 2,3-disubstituted quinolinesviaa Povarov multicomponent reaction and subsequent oxidation

“…14,15 Recently carbon nanomaterials, with particular reference to graphene oxide (GO), have shown to exhibit interesting catalytic activity in organic transformations, [16][17][18] such as C-C bond formation, 19,20 C-N and C-O oxidation, [21][22][23] thiol oxidation 24 and different MCRs. [25][26][27][28][29][30][31][32] GO is a p-conjugated planar material characterized by the following structure and active sites: 16,18,33 a few nm large aromatic Csp2-domains surrounded by oxygen functional groups (e.g. alcohols, epoxides and carboxylic acids) as well as free radicals, which are due to internal structural defects.…”

Insights into the Photobehavior of Fluorescent Oxazinone, Quinazoline, and Difluoroboron Derivatives: Molecular Design Based on the Structure–Property Relationships

“…Organic luminescent materials are nowadays in the limelight due to their various advantages over the traditional inorganic counterparts, including cheaper production, easier fabrication, and tunable emission wavelength. − Among the diverse candidates of organic fluorescent dyes in the biological and medical fields, the oxazinone and quinazoline derivatives are more prominent because of their intriguing bioactivities: The oxazinone derivatives are reported to be the promising antimicrobial agents and HIV-1 reverse transcriptase inhibitors; − however, as the fluorophores, their relatively lower fluorescence quantum yields restrict the practical uses of fluorescence labeling to report the biochemical reaction sites by themselves. , Likewise, the quinazoline series have been extensively investigated on account of their various bioactivities such as the antibacterial, anticancer, and enzyme-inhibiting properties. − Apart from the appealing bioactivities, their excellent fluorescence properties are also under the spotlight by virtue of the higher fluorescence quantum yields, good photostability, and larger Stokes shifts. − The difluoroboron family, promising to enhance the molecular absorption/emission intensity or even alter the corresponding wavelength, is often employed to improve the optical properties of parent dyes, ,− and thus various difluoroboron derivatives have been designed and reported, which promote the development and broaden the application of organic fluorescent dyes. − …”