excellent yields
An Efficient Protocol for Synthesis of 1,4-dihydropyridine Derivatives by Using Graphene Oxide Nano Particles as a Catalyst
... to excellent yields from aliphatic, various aromatic aldehydes, ethyl acetoacetate, methyl acetoacetate and ammonium acetate in presence of graphene oxide as a heterogeneous and metal free acid catalyst ...
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An ultrasonic assisted multicomponent reaction for the synthesis of 3, 4 dihydropyrimidin 2(1H) ones under solvent free condition
... One pot multicomponent reaction promoted by the synergy of combined use of Chlorosulphonic acid and ultrasound offers an easy access to substituted DHPMs in excellent yields. The products can be easily ...
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One Pot Three Component Domino Reaction for the Synthesis of Novel Isoxazolo[2,3 c][1,3,5]Thiadiazepin 2 Ones Catalyzed by PTSA—A Green Chemistry Approach
... The use of solid acid catalyst has gained importance in organic synthesis because of their several advantages such as operational simplicity, non-toxicity, reusability, low cost, and easy isolation after completion of ...
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Isoxazolines: An insight to their synthesis and diverse applications
... in excellent yields and in smaller reaction times using mild, effective and environmentally friendly butylmethylimidazolium bromide as the solvent and ...good yields, while N- acetyl derivatives give ...
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(1 (4 Methoxybenzyl) 1 H 1,2,3 triazol 4 yl)methanol (MBHTM) accelerated copper catalyzed [3+2] azide alkyne cycloaddition (CuAAC) at low catalyst loading in PEG H2O as green reaction media
... to excellent yields, use of PEG-Water as green reaction media, broad substrate scope coupled with mild reaction conditions employed here makes the present protocol potentially useful in organic ...
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Tribromo melamine (TBM) as an efficient and inexpensive catalyst for the one-pot synthesis of benzimidazoles and benzoxazole derivatives
... confirmed by comparison with those available in the literature. In general, the results given in Table 2 show that good to excellent yields of Benzimidazole and Benzoxazole derivatives were obtained under ...
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Eco-Friendly Access to β -Ketoamides: one-step Catalyst – and solvent-free Amidation of β -Ketoesters under Microwave Irradiation
... A variety of secondary amines were efficiently converted to the corresponding products in moderate to excellent yields (52%-quantitative). The reaction of cyclopentanone-ester 2a with morpholine and ...
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ONE POT SYNTHESIS OF 3, 4 TETRAHYDROPYRIMIDINE 5 CARBOXYLATE USING LANTHANUM (III) CHLORIDE (LACL3 7H2O) AS A CATALYST
... and EtOH) and under solvent-free conditions. Under these Conditions, the reactions were sluggish, and the formation of by products was observed. To evaluate the substrate scope of the reaction, we evaluated a variety of ...
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[Bmim]PF6: An efficient tool for the synthesis of diverse bioactive heterocycles (Review)
... xanthenes (59, Scheme 21) and chromene derivatives (60, Scheme 22) were also synthesized starting from various aromatic aldehydes (4), 1,3-cyclohexanediones (37b or 37b′) and β-naphthol (57) or 4-hydroxycoumarin (58), ...
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Saccharin as a new organocatalyzed: a fast, highly efficient and environmentally friendly protocol for synthesis of imidazo[1,2-α]pyridine derivatives via a one-three component reaction
... In this research article, we report the synthesis of imidazo[1,2-a]pyridine derivatives through Ugi condensation in the presence of saccharin as an organocatalyst used in a three component reaction. The convenient ...
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Glycerol Based Carbon SO3H Catalyzed Benign Synthetic Protocol for the Acetylation of Alcohols, Phenols and Amines under Solvent Free Conditions
... functionalized polycyclic aromatic carbon catalyst from bioglycerol (biodiesel by-product) and also from glyc- erol-pitch (waste from fat splitting industry) by in situ partial carbonization and sulfonation [49,50]. Such ...
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Grindstone Chemistry: An Efficient and Green Synthesis of 2-Amino-4H-benzo[b]pyrans
... in excellent yields and purity with very short reaction times from readily available starting materials by using minimum amount of sodium ethoxide as a solid base catalyst, in solventless ...has ...
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Synthesis and single crystal structures of substituted 1,3 selenazol 2 amines
... the yields of 87% and 90%, respectively, by reaction of Woollins’s reagent with the corresponding cyanamides 1 and 2, followed by post-treatment with water ...in yields comparable to electron-deficient ...
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Synthesis of 1,3 disubstituted pyrazoles using ionic liquid
... Pyrazoles are well known five-membered nitrogen containing heterocyclic compounds possessing diverse bioactivities and are used extensively in pharmaceutical industry. Here we have used ionic liquid as a solvent which is ...
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A Facile Regioselective 1,3-dipolar Cycloaddition Protocol for the Synthesis of Thiophene containing Spiro Heterocycles
... to-excellent yields in short reaction times, easy workup, mild reaction conditions and catalyst-free conditions (environmental friendliness, because no transition metals are ...with excellent ...
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C-C COUPLING REACTIONS CATALYZED BY NANOCRYSTALLINE MAGNESIUM OXIDE
... The recyclable nanocrystalline magnesium oxide was used for WE reaction of aldehydes with various phosphonates to afford E-α,β-unsaturated esters and Z-α,β- unsaturated nitriles with excellent yields under ...
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NaBH4/NaNO3/H2O: A Convenient System for Selective Reduction of Aldehydes VS. Ketones to their Corresponding Alcohols
... NaBH 4 (1.25 equivalents) & NaNO 3 (3 equivalents) reduce a variety of aldehydes in the presence of ketones to their corresponding alcohols. Also, regioselectivity and exclusive 1,2- reduction enals to their ...
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` SYNTHESIS OF SOME BIOLOGICALLY ACTIVE MOLECULES VIZ CYTOXAZONE, C3-to-C6' SEGMENT OF FILIPIN, N-HOMOBICYCLIC DIDEOXY, N-HOMONUCLEOSIDES ANALOGUES AND DEVELOPMENT OF SOME NOVEL SYNTHETIC METHODOLIGIES
... The reaction of tri-O-acetyl-D-glucal and tri-O-benzyl-D-glucal with various alcohols and thiols to afford the corresponding glycopyranosides in excellent yields by bis[r] ...
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... of indoles were reacted with alcohols, which gave the desired products in good to excellent yields (Table 3, entries 1-10). It was found that indoles containing electron-releasing groups were more reactive ...
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Nano-TiCl4.SiO2: A Versatile and Efficient Catalyst for Synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes
... prepared and used as an acid catalyst for the 14-aryl or alkyl-14H- dibenzo[a,,j]xanthenesreaction under solvent-free conditions. Compared to the classical 14-aryl or alkyl-14H- dibenzo[a,j]xanthenesreaction conditions, ...
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