Catechinone hair dyestuff was produced chemically from (+)-catechin by the oxidation with O2 in basic water/alcohol mixed solution. The effects of reaction conditions such as basicity, sorts of added base, temperature, alcohol molar fraction of solvent and sorts of added alcohols on the catechinone formation were studied in order to increase the efficiency of the dyestuff production. The amount...

SBA-15 prepared via ethanol extraction for template removing was grafted with three kinds of amine precursors (mono-, di-, tri-aminosilanes) to synthesis new CO₂ adsorbents. The SBA-15 support and the obtained adsorbents were characterized by X-ray diffraction (XRD), small-angle X-ray scattering (SAXS), N₂ adsorption/desorption, thermogravimetry (TG), elemental analysis, Fourier transform infra...

The title zinc bis(thiosemicarbazone) complex, [Zn(C 22 H 17 N 4 O 2 S) ], comprises two , S -donor anions, leading to a distorted tetrahedral donor set. resultant five-membered chelate rings are nearly planar and form dihedral angle of 73.28 (3)°. configurations about the endocyclic- exocyclic-imine bonds Z E respectively, that ethylene bond is . major differences in conformations ligands seen...

The title compound, C(20)H(23)N(4)O(6)PS, was synthesized by the reaction of N-(4-methoxy-benzyl-idene)-5-(4-nitro-phen-yl)-1,3,4-thia-diazol-2-amine and diethyl phosphite. The thia-diazole and nitro-substituted phenyl rings in the mol-ecule are approximately coplanar, the dihedral angle being 5.3 (2)°. The dihedral angle formed by the mean plane through all non-H atoms of both the thia-diazole...

The title mol-ecule, C(26)H(22)N(4)S, is composed of three main parts, viz. a triphenyl-amine group is connected to a phenyl ring by a thio-semicarbazone moiety. The C= N double bond has an E conformation. The crystal packing is dominated by strong hydrogen bonds through the thio-semicarbazone moiety, with pairs of N-H⋯S hydrogen bonds linking the mol-ecules to form inversion dimers with an R(2...

The dinuclear barium-zinc complex, μ-chlorido-1:2κ(2) Cl:Cl-chlorido-2κCl-bis-(2-meth-oxy-ethanol-1κO)bis-(2-meth-oxy-ethanol-1κ(2) O,O')bis-(μ-tri-phenyl-acetato-1:2κ(2) O:O')bariumzinc, [BaZn(C20H15O2)2Cl2(C3H8O2)4], has been synthesized by the reaction of barium tri-phenyl-acetate, anhydrous zinc chloride and 2-meth-oxy-ethanol in the presence of toluene. The barium and zinc metal cations in...

A series of Benzylidene-(2-{5, 6-substituted-1-[2-(1H-tetrazol-5-yl)-biphenyl-4-ylmethyl]1H-benzoimidazol-2-yl}-phenyl-amine have been synthesized by 4'-{2-[2-(Benzylideneamino)-phenyl] 5, 6-substitutedbenzimidazol-1-yl}-biphenyl-2-carbonitrile.Preliminary screening of the title compounds for antihypertensive activity was performed. Only one of the compound was found to possess antihypertensive...

Diphenyl-(4-{2-[4-(2-pyridin-4-yl-vinyl)-phenyl]-vinyl}-phenyl)-amine (DPVPA) constitutes a novel acido-triggered reversible luminescent and nonlinear optical switch. Remarkably, for the first time the Electric-Field Induced Second Harmonic generation (EFISH) technique is used to reveal a protonation-deprotonation NLO contrast.

A novel series of sulpha/ substituted phenyl azo indoles is synthesised by the condensation reaction of N.phenacyl sulpha/ substituted phenyl amine with diazonium salt of sulpha/substituted benzene. They were characterized by IR, NMR and UV spectra and screened for their promising antituberculosis activity and antifertility activity. Keyword: indoles, sulpha/ substituted, drug, biological activ...

2-Phenyl-4-alkyl-4-hydroxymethyl-1,3-oxazolones (2a-d) have been identified as side products accompanying activation of N-benzoyl-2-alkylserines (1a-d). Oxazolones 2a-d in the presence of amine rearrange subsequently to corresponding 4-alkyl-2-phenyl-4,5-dihydro-1,3-oxazole-5 carboxylic acids (4a-d) at a 20-68% yield.