RESUMO
The triacylglycerol (TAG) composition of ostrich oil (Struthio camelus) was determined by non-aqueous reversed-phase ultra-performance liquid chromatography-mass spectrometry. Using a column with 150 mm in length, the TAGs were separated efficiently with acetonitrile/2-propanol gradient at flow rate of 0.2 mL/min for 20 min. Detection is performed by positive APCI mass spectrometry, accurate mass measurements (<3 ppm) and definite elemental composition for molecular ions and fragment ions were obtained to enable characterisation of 24 TAGs in both ostrich oil and emu oil. In terms of TAGs composition and contents, the ostrich oils are similar to emu oils. This result indicates that the ostrich oil could be a good choice of substitution for emu oil, which is expensive and comparatively rare, in food, dietetics and cosmetics industry.
Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Espectrometria de Massas/métodos , Óleos/química , Triglicerídeos/química , Animais , Óleos/isolamento & purificação , Struthioniformes , Triglicerídeos/isolamento & purificaçãoRESUMO
A highly efficient Friedel-Crafts reaction of pyrroles with nitroolefins by a chiral phosphoric acid was realized. With 5 mol % of catalyst, reactions conducted at rt afforded the 2-substituted or 2,5-disubstituted pyrroles in up to 94% ee for a wide range of substrates.
RESUMO
Slowly does it! By adding the substrate by a syringe pump, a highly efficient Friedel-Crafts reaction of 4,7-dihydroindoles with nitroolefins was realized with 0.5 mol % of a chiral phosphoric acid. The Friedel-Crafts alkylation, together with a subsequent oxidation of the product, led to 2-substituted indoles in excellent enantiomeric excesses, which can be easily transformed to enantioenriched tetrahydro-gamma-carbolines.
Assuntos
Alcenos/química , Indóis/química , Catálise , Ácidos Fosfóricos/química , EstereoisomerismoRESUMO
To discover new 1,2,4-triazole derivatives which may possess significant biological activities, we synthesized a series of novel 6-aryl-3-(D-galactopentitol-1-yl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines and 4-(arylmethylidene)amino-5-(D-galactopentitol-1-yl)-3-mercapto-4H-1,2,4-triazoles from 4-amino-3-(D-galactopentitol-1-yl)-5-mercapto-1,2,4-triazole. All the title compounds were characterized by elemental analysis, IR, 1H- and 13C-NMR. Plant growth-regulating activity tests showed that these compounds have remarkable effects on the growth of radish and wheat.
Assuntos
Raphanus/efeitos dos fármacos , Álcoois Açúcares/farmacologia , Triazóis/síntese química , Triazóis/farmacologia , Triticum/efeitos dos fármacos , Raphanus/crescimento & desenvolvimento , Triazóis/química , Triticum/crescimento & desenvolvimentoRESUMO
We have synthesized a number of novel Schiff's bases from 4-amino-3-(D-glucoheptonic-hexitol-1-yl)-1H-1,2,4-triazole-5-thione. By attaching D-glucoheptonic-hexitol-1-yl residues to 1,2,4-triazole at the 3-position, the solubility of the title compounds has been improved greatly. All the products have been characterized by elemental analysis, IR, 1H-NMR, 13C-NMR and MS. The plant-growth regulating effects of the title compounds were examined. From the biological activity results, we found that most compounds showed weak to moderate activities.
Assuntos
Bases de Schiff/síntese química , Triazóis/química , Desenvolvimento Vegetal , Plantas/efeitos dos fármacos , Bases de Schiff/farmacologia , Solubilidade , Análise EspectralRESUMO
A series of 6-aryl-3-(3-hydroxypropyl)-7H-1,2,4-triazolo[3,4-b][1,3,4]-thiadiazines were synthesized by the reaction of 4-amino-3-(3-hydroxypropyl)-5-mercapto-1,2,4-triazole (1) with substituted omega-haloacetophenones. Their structures were confirmed by elemental analysis, IR, 1H-NMR, and 13C-NMR. Tests of plant growth regulating effects showed that the title compounds display remarkable inhibitory activities on the growth of radish and wheat.