Abstract 1-benzyl-3-methyl imidazolium hydrogen sulphate [bnmim][HSO4] was found to be an effective catalyst for the condensation reaction of indoles and derivatives with benzaldehydes in microwave irradiation lower time higher yields give bis(indolyl) methanes.

An efficient and greener protocol for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one using tetradecyltrimethylammonium bromide (TTAB) at room temperature in water is described.

Ammonium metavanadate (NH 4 VO 3 ) is an inexpensive, efficient and mild catalyst for the synthesis of α-hydroxyphosphonate derivatives by reaction various aryl or heteroaryl aldehydes with triethylphosphite at room temperature.This method affords αhydroxyphosphonates in short times, under solvent-free conditions, high yield.

Alum <TEX>$(KAl(SO_4)_2{\cdot}12H_2O)$</TEX> is an inexpensive, efficient, non‐toxic and mild catalyst for the synthesis of bis(indolyl)methanes by reaction 1H-indole with various aldehydes/ketones under influence ultrasound irradiation in solvent‐free condition. The remarkable advantages this method are simple experimental procedures, shorter times, high yields product green aspects avoiding toxic catalysts solvents.

Abstract Polyethylene glycol-400 has been found to be a recyclable and rapid reaction medium for the synthesis of 2-amino-4H-chromenes by condensation aromatic aldehyde, malononitrile, α-naphthol. This method gives remarkable advantages such as simple work up, high yields, greener avoiding toxic catalyst hazardous solvents.

Two methods for the simultaneous determination of Emtricitabine and Tenofovir by spectroscopy have been developed.These two simple, accurate precise include Area Under Curve (AUC) method Dual Wavelength Method.From a solvent effect studies spectral behaviours Tenofovir, methanol was selected as solvent.Emtricitabine shows maximum absorbance at 281 nm 259 nm.For AUC method, wavelength ranges between 242-248 269-275 were with reference to curves plotted wavelengths 200-400 nm.In second...

Abstract Alum (KAl(SO4)2·12H2O) is an inexpensive, efficient, and non-toxic catalyst used for the synthesis of 5-arylidine-2,4-thiazolidinediones by Knoevenagel condensation aromatic aldehydes with 2,4-thiazolidinedione in aqueous media at 90°C. This method affords short reaction times, high yields, green aspects avoiding toxic catalysts hazardous solvents.

Abstract Bis(indolyl)methanes were synthesized from indole and aldehydes under solvent-free conditions using cellulose sulfuric acid (CSA) as a catalyst at room temperature. CSA is easily prepared it was also found that this could be recovered quantitatively reused without much loss of catalytic activity.

Abstract An efficient synthesis of novel α-aminophosphonates by the reaction quino[2,3-b][1,5]benzoxazepines with triethyl phosphite in presence easily available, inexpensive, and nontoxic catalyst p-toluene sulphonic acid (p-TSA). This method affords under influence ultrasound irradiation solvent-free conditions, short times (4–6 min), high yields (80–90%), improved purity. The synthesized show antibacterial activity against Gram-positive Gram-negative bacteria. Supplemental materials are...

An efficient and novel one-pot synthesis of new 3,4-dihydro-3-substituted-2H-naphtho[2,1-e][1,3]oxazine derivatives from 1-naphthol, various anilines formalin at room temperature grinding is presented. The six-membered N,O-heterocyclic skeleton was constructed via zirconyl(IV) chloride promoted Mannich type reaction. In vitro antimicrobial activities synthesized compounds have been investigated against Gram-positive Bacillus subtilis, Gram negative Escherichia coli two fungi Candida albicans...

We have demonstrated a one-pot three component coupling of an aldehydes, amines, and triethyl phosphite using 1-benzyl-3-methyl imidazolium hydrogen sulphate [bnmim][][<TEX>$HSO_{4}$</TEX>] as efficient catalyst. All the reactions proceed under solvent-free conditions at room temperature. This methodology afforded corresponding <TEX>$\alpha$</TEX>-aminophosphonates in shorter reaction times with excellent yields.

Abstract A simple, efficient, and practical procedure for the synthesis of various substituted 2,3-dihydro-2-phenyl-1H-naphtho[1,2-e][1,3]oxazines 3,4-dihydro-3-phenyl-2H-naphtho[2,1-e][1,3]oxazines using KAl(SO4)2 12H2O (alum) as a non-toxic, reusable, inexpensive, easily available catalyst is described water solvent. These improved reaction conditions allow preparation wide variety [1,3]oxazines in high yields purity under mild conditions.

Ammonium acetate plays a dual role for the solvent-free synthesis of 1,3-oxazine under neat heating at 60°C and microwave irradiation with excellent yields. The synthetic strategy involved formation Betti base which upon condensation aromatic aldehydes gives preferred oxazine ring. present protocol contributes remarkable advantages, such as solvent- catalyst-free reaction conditions, simple work-up procedures, shorter times, environmentally benign methodology.

Abstract magnified image A method for the synthesis of previously unknown heterocyclic systems 4‐((5‐(difluoromethoxy)‐1 H ‐benzo[d]imidazol‐2‐ylthio)methyl)tetrazolo[1,5‐a]quinolines derivatives 6 has been developed based on various substitutes 2‐chloroquinoline‐3‐carbaldehydes 1 via consecutive steps conversion into tetrazolo[1,5‐a]quinoline‐4‐carbaldehyde 2 treatment with sodium azide which upon reduction to corresponding alcohol 3 , chlorides 4 thionyl chloride followed by coupling...

The research portrayed here is deals with the synthesis of bare Co₃O₄ material and carbon nanotubes modified g-C₃N₄- material. Initially, cobalt oxide was synthesized by co-precipitation technique. utilized for preparing CNT-g-C₃N₄-Co₃O₄ nanocomposite heat beat method. These both solid materials viz. were designing gas sensor means standard screen printing Both these fabricated analyzed several...

A series of diethyl (4-fluorophenylamino) (substituted tetrazolo[1,5-a]quinolin-4-yl)methyl phosphonate derivatives has been synthesized for the first time from tetrazolo [1,5-a] quinoline derivatives. Elemental analysis, IR, 1H NMR, 13C and mass spectral data elucidated structures all newly compounds. In vitro antimicrobial activities compounds have investigated against Gram-positive Bacillus subtilis, Gram-negative Escherichia coli, two fungi Candida albicans Aspergillus niger in...