Search results for "Chloroformate"

showing 2 items of 32 documents

Reaction of Diphenyldiazomethane withN-Methyloxy- andN-Ethyloxycarbonyl-N-(2,2,2-trichloroethylidene)amines

1999

Reaction of the title imines with diphenyldiazomethane gives a Δ3-1,3,4-triazoline, which leads, after loss of dinitrogen, to a transient azomethine ylide. Subsequent elimination of ethyl or methyl chloroformate gives the unexpected 1,1-diphenyl-4,4-dichloro-2-aza-1,3-butadiene.

chemistry.chemical_compoundchemistryMethyl chloroformateOrganic ChemistryAzomethine ylidePhysical and Theoretical ChemistryMedicinal chemistryEuropean Journal of Organic Chemistry
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Identification by GC-FID and GC-MS of amino acids, fatty and bile acids in binding media used in works of art.

2001

GC-FID was used as single methodology for the identification and differentiation of proteins, lipids and ox bile from binders used in artistic paintings. The samples were hydrolyzed by HCl. Subsequently, the simultaneous formation of volatile derivatives of the amino, fatty and bile acids with ethyl chloroformate was performed quickly and safely in an aqueous medium. The derivatives were separated by capillary GC and characterized by GC-MS. The ageing of drying oils was studied, identifying pelargonic acid among other degradation products. Proteinaceous and lipoid binding media were characterized by means of the quotients between the areas of the peaks for each amino or fatty acid with resp…

food.ingredientChromatography Gasmedicine.drug_classFatty Acids NonesterifiedBiochemistryGas Chromatography-Mass SpectrometryPalmitic acidBile Acids and Saltschemistry.chemical_compoundHydrolysisfoodLinseed oilmedicineOrganic chemistryPlant OilsAmino Acidschemistry.chemical_classificationChromatographyBile acidChemistryFatty AcidsFatty acidAmino acidEthyl chloroformatePaintingsPolyunsaturated fatty acid
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