2-acetyl physcion (2-acetyl-1,8-dihydroxy-6-methoxy-3-methyl-9,10-anthraquinone, 2), a rare anthraquinone, was isolated from Senna macranthera var. nervosa (Vogel) H.S. Irwin & Barneby (Fabaceae). The chemical structure was elucidated and all (1)H and (13)C NMR chemical shifts were assigned by NMR one- ((1)HNMR, {(1)H}-(13)CNMR, and APT-(13)CNMR) and two (COSY, NOESY, HMQC and HMBC) dimensional...

Photo-responsive self-assemblies based on bio-inspired bolaamphiphiles with oligo (ethylene oxide) hydrophilic outer segments and a hydrophobic inner segment with thymine were investigated. The morphology of the self-assemblies transformed from ribbon-like structures to spherical structures in water by UV irradiation which was investigated by (1)HNMR, (13)CNMR, DLS and TEM.

From the aerial parts of the endemic species Thymus numidicus Poiret locally which is known as “zaatar”, belongs to the Lamiaceae family five flavonoids were isolated using chromatographic techniques and identified by spectral analysis (UV-Visible, MS, H and CNMR) and chromatographic behaviours.

One pot synthesis of 1-arylpyrazolo[3,4-d]pyrimidin-4-ones by the reaction of 5-amino-N-substituted-1H-pyrazole-4-carbonitrile with different lower aliphatic acids in the presence of POCl(3) has been developed. The structures of all the title compounds have been confirmed by IR, (1)H-NMR, (13)CNMR, and elemental analyses. Moreover, the structures of one of these compounds, 2c, was confirmed by ...

A series of sterically hindered μ-oxo bis [tricyclohexylantimony (V)] carboxylates [(cyclo-C6H11)3Sb-O-Sb(cycloC6H11)3](OCOR)2 where -OCOR = p-trifluoromethyl mandelate, p-methoxy mandelate, salicyclate, 2pyrazine carboxylate, mandelate has been synthesised and characterised by solid state infrared, H , Fand C NMR spectroscopy, molecular weight and conductance measurements. The newly synthesize...

A simple and efficient method is developed for the zinc catalyzed Claisen rearrangement of allyl aryl ethers to o-allyl phenols by stirring in an oil-bath at 55 °C in liquid phase. Moreover, zinc powder is re-cyclable up to six times use without much loss of significant activity. In addition to it, the products are obtained in good to excellent yields and are in a state of high purity. The stru...

A series of new tri and tetra-organoantimony (V) aryloxyacetates of the general formula R3Sb(OCOCH2OR’)2; and R4Sb(OCOCH2OR’) [where R = p-OCH3C6H4-, C6H5& R’ = p-CH3C6H4-, m-CH3C6H4-, o-CH3C6H4-, β-C10H7-, o-ClC6H4-], have been synthesised and characterised. These complexes are monomeric in benzene and non-electrolyte in acetonitrile. IR, NMR spectral data suggest the hepta-coordination with w...

The synthesis and characterization, spectroscopic, and biological studies of 2-acetylferrocenyl-4phenylthiosemicarbazone, 2-acetylferrocenyl-4-methylthiosemicarbazone, 2-acetylpyridine-2thiophenecarboxylsemicarbazone and 2-acetylferrocenyl-2-thiophenecarboxylsemicarbazone with copper(II) chloride are reported here. The ligands were synthesized by condensation reaction of appropriate carbonyl an...