The identification of (4S)-4-methyl-3-heptanone among the volatiles produced when male Scolytus scolytus bore into four species of Ulmus is described. The quantity of 4-methyl-3-heptanone found in extracts of volatiles was 12–32% of the total amount of 4-methyl-3-heptanol present.From gas chrom...
4-Methyl-3-heptanone has been identified as the main constituent present in the secretion from the scent glands of the opilionids Leiobunum formosum and L. speciosum. The contents of the scent glands are discharged when the opilionids are irritated and can function as an effective defensive secr...
All four possible stereoisomers of 5-hydroxy-4-methyl-3-heptanone were synthesized from common achiral reagents using fast, straightforward organic synthesis, including the use of whole tissue of Daucus carota, Solanum melongena, and Pleurotus ostreatus.
Potent in vitro inhibition of the enzyme aldose reductase (AR) was observed with several members of a series of 3-alkylated 2(1H)-benzimidazolone-1-acetic acids, as well as with analogs from a structurally-related series of oxindole-1-acetic acids with 3-alkyl or 3-alkylidene substituents. Intri...
Naphtho[2,1-b]pyranone (3) was allowed to react with arylmethylenemalononitriles to yield 4-amino-5-oxo-2-aryl-5H-dibenzo[c,f]chromene-3-carbonitriles (4a,b); with ethyl 3,4-dichlorobenzylidene cyanoacetate to furnish dibenzo[c,f]chromene (5) and with elemental sulfur in dioxane containing piper...
Electronic effects of electron-donating and electron-withdrawing substituents at the para position of the phenyl moieties of BINAP ligands were studied towards asymmetric hydrogenation of α-(acylamino)acrylic acids. Enantiomeric excesses varied as a linear relationship towards Hammett coefficie...
A series of amino acids conjugated quinazolinone-Schiff’s bases were synthesized and characterized by analytical and spectroscopic methods. All the synthesized analogues (8–43) and the intermediates (1–7) were screened for their in vitro antibacterial and antifungal activities. In antimicrobi...
Oleoyl Formononetin (OF) has good weight loss activity and hypolipidemic activity, could improve insulin sensitivity and suppress adipogenesis. To acquire better biological activities, three series of flavonoid fatty acid esters were designed and synthesized by optimizing the structure of OF. Th...
Facile and convenient synthesis of α,β-unsaturated esters and thioesters from alkylidene derivatives of Meldrum’s Acid is described. This method uses catalytic amount of FeCl3·6H2O (0.001–0.005 equiv) with alcohols/thiols (1 equiv) in dry CH3NO2 followed by catalytic amount of piperidine. A...
A new series of N-acylhydrazone derivatives of 2-mercaptobenzimidazole (2-MBI) has been synthesized through S-alkylation with 1-bromotetradecane and N-alkylation with ethyl-2-chloroacetate. The resulting ester was synthetically modified through hydrazine hydrate to acyl hydrazide which was conde...
A series of six novel 2-(5-arylidene-2,4-dioxotetrahydrothiazole-3-yl)propanoic acids and six corresponding methyl esters were synthesized. All compounds were characterized by melting points, elemental analysis, FT-IR, 1H and 13C NMR spectroscopy. Crystal structure of methyl-2-(5-(4-methoxybenzy...
RésuméLes acylhydrazones de type o-Cl-C6H4-C(R1)=N-NH-CO-R présentent, pour de nombreux termes, des activités antihypertensives notables (rat SHR), malgré la présence d'un seul chlore en position 2 du noyau benzénique. Les activités sont plus marquées pour R1 = CH3 que R1 = H. Les ...
A ligand L has been synthesized by the condensation of 4-chlorobenzaldehyde and 2-amino-5-chlorobenzophenone. The complexes 1–5 of Pb+2, Ni+2, Co+2, Cu+2 and Cd+2 with ligand were prepared. The newly synthesized ligand L and its complexes 1–5 were characterized on the basis of elemental analys...
The title compounds were prepared by treating a mixture of 5-oxazolone derivatives with substituted aromatic amines in the presence of a zeolite (Y-H) catalyst.
A new effective approach to the synthesis of some new (Z)-5-(substituted)-2-thioxothiazolidin-4-one 3a–l and (Z)-5-(substituted)-2-(methylthio)thiazol-4(5H)-one 5a–l is reported under microwave irradiation as well as conventional conditions.
The clastogenicity of the sensory irritant 2-chlorobenzylidene malonitrile (CS) to V79 Chinese hamster cells was investigated at various exposure conditions. CS efficiently induced chromatid-type aberrations in a dose-dependent manner provided the cells could run through at least one or two S-ph...
(2E,6E)-2,6-bis(2-chlorobenzylidene) cyclohexanone was synthesized and characterized by proton and carbon nuclear magnetic resonance, infrared, ultraviolet-visible, mass spectral analysis and X-ray crystallography techniques. Quantum Chemical calculations were done using Becke3-Lee-Yang-Parr wit...
The Schiff base (E)-N3-(2-chlorobenzylidene)-H-1,2,4-triazole-3,5-diamine was synthesised and characterized by FT-IR, Raman, 1H & 13C NMR, UV–Vis and mass spectrometry. A density functional theory based quantum chemical calculations were performed at B3LYP/6-311++G(d,p) level of theory. A compa...
The changes in the vibrational frequencies of 1-tert-butyl and 1,2-di-tert-butyl derivatives of 3,3-dimethylcyclopropene brought about by substitution of the central carbon atom (X) of the tert-butyl moieties by Si, Ge, Sn, or Pb atoms are examined. The most important decrease in the vibrational...
A novel acceptor building block, 3,7-bis((E)-2-oxoindolin-3-ylidene)-3,7-dihydrobenzo[1,2-b:4,5-b′]dithiophene-2,6-dione (IBDT), is developed to construct a donor-acceptor polymer PIBDTBT-40. This polymer has favorable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular or...
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