Abstract: In this work, a novel method of microwave assisted chemical precipitation procedure was used to synthesize AgInS2 nanoparticles. Ag, In and S precursors with a stoichiometric ratio of 1:1:2 were dissolved in ethylene glycol as solvent and compolexing agent. The resultant precipitation was placed under microwave irradiation for 5 min to obtain product. X-ray diffraction pattern (XRD) and scanning electron microscopy (SEM) were employed to characterize the final product.

Abstract: An asymmetric aldol reaction is one of the most common methods for carbon-carbon bond formation in organic molecules. It is extensively applied in the synthesis of carbohydrates, amino sugares, steroids, and other valuable chiral organic compounds. It provides an atom-economic approach to β-hydroxyl carbonyls, which make up a large family of chiral intermediates for the synthesis of biologically active substances and natural products. In continuation of our research in environmentally benign and microwave assisted conditions, we now report an operationally simple and fast method for the preparation of aldol products by one-pot condition reaction. In this research, the direct aldol reaction of ketones with aromatic aldehydes using catalytic amount of RuCl₃.nH₂O and chiral ligand proceeded smoothly under extremely mild conditions to give the corresponding aldol adducts in good yields with moderate to good diastereoselectivity. The system can efficiently proceed at room temperature with a small excess of ketone. From a practical and economic point of view this reaction condition is convenient with respect to most of other protocols where a large excess of ketone is used. Also, microwave technique offers simple, clean, fast, efficient, and economic for the synthesis of a large number of aldol adducts. All the synthesized compounds are confirmed by spectroscopy methods such as ¹H-NMR, ¹³C-NMR and IR. Important advantages of this thechnology include highly accelerated rate of the reaction, reduction in reaction time with an improvement in the yield and quality of the products.

Abstract: Derivatives of quinoline and its isosters are remarkable compounds with many different kinds of biological effects. A number of quinoline related compounds expressed antifungal, antibacterial, antiviral, antineoplastic, and other activities. In order to perform the classical synthesis of amides activation of quinoline-2-carboxylic acid is usually required. When activation is carried out under standard conditions with thionyl chloride, formation of undesired chloro compound where chlorine is attached in position 4 of quinoline ring is observed. In this study we have developed a method for preparation of substituted anilides in one step, based on the direct reaction of an acid or ester with substituted anilines using microwave irradiation. In recent developments, the use of microwave irradiation to simplify and improve classic organic reactions has become a very popular method, because it often leads to higher yields, cleaner reactions and shorter reaction times. In connections with solvent-free conditions, microwave-assisted methods result in very efficient and environmentally friendly technology. The method was tested on compounds: 2-quinaldic acid and its methyl and phenyl ester, 2-naphthoic acid and its ethyl ester. All those compounds reacted with 4-bromaniline as a model aniline. The synthesis was carried out under solvent-free conditions or in solvents: DMF and chlorobenzene. Despite the fact, that formation of anilides under microwave irradiation is hampered by competitive decarboxylation of quinaldic acid to quinoline, this technique showed certain advantages like shorter reaction time, no use of aggressive chemicals and simpler work-up. From the series of experiments is evident, that the use of phenyl ester is the most effective for microwave accelerated synthesis of anilides. A series of substituted anilides of quinaldic acid were prepared by developed method.

Abstract: A rapid and efficient procedure for the synthesis of N-arylamines by aromatic nucleophilic substitution of activated as well as unactivated aryl halides with various amines using solvent-free microwaves activation under green chemistry conditions was described. Good to excellent yields were obtained in very short reaction time.

Abstract: Some new substituted isatin (2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)thiosemicarbazones were synthesized by reaction of 2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl thiosemicarbazide and corresponding substituted isatin using microwave-assisted heating method.

Abstract: The reaction of tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione with phenol or N-methylaniline promoted by microwave heating, under solventless conditions, led to the opening of the oxirane ring through the less hindered carbon, leading to tripodal triols with C₃ symmetry in good yields.