Search results for " Carbamate"

showing 4 items of 4 documents

Formation of dibutyl carbonate and butylcarbamate via CO2 insertion in titanium(IV) butoxide and reaction with n-butylamine

2016

Abstract The species resulting from insertion of 12CO2 and 13CO2 into titanium(IV) butoxide is for the first time fully characterized by means of infrared and nuclear magnetic resonance spectroscopy. Results show formation of Ti-monobutylcarbonate, that easily undergoes nucleophilic attack by an aliphatic amine. The hydrolysis of the resulting species produces butylcarbamate and dibutylcarbonate as the only main products. Characterization results of the carbonate-like adduct, along with its reactivity with amine molecules open the route to new ways of CO2 utilization as building block for valuable organic compounds.

010405 organic chemistryChemistryProcess Chemistry and Technologyn-Butylaminechemistry.chemical_elementNuclear magnetic resonance spectroscopy010402 general chemistry01 natural sciences0104 chemical sciencesAdductHydrolysischemistry.chemical_compoundNucleophilePolymer chemistryChemical Engineering (miscellaneous)Organic chemistryReactivity (chemistry)Amine gas treatingSettore CHIM/07 - Fondamenti Chimici Delle TecnologieWaste Management and DisposalTitaniumDibutyl carbonate CO2 insertion Titanium alkoxides Carbamate
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Ombitasvir, paritaprevir, and ritonavir, with or without dasabuvir, plus ribavirin for patients with hepatitis C virus genotype 1 or 4 infection with…

2017

Summary Background We ran a compassionate use nationwide programme (ABACUS) to provide access to ombitasvir, paritaprevir, and ritonavir, with dasabuvir, plus ribavirin for hepatitis C virus (HCV) genotype 1 infection and ombitasvir, paritaprevir, and ritonavir, plus ribavirin for HCV genotype 4 infection in patients with cirrhosis at high risk of decompensation while approval of these regimens was pending in Italy. Methods In this prospective observational study, we collected data from a compassionate use nationwide programme from March 17, 2014, to May 28, 2015. Patients with HCV genotype 1 infection and cirrhosis at high risk of decompensation were given coformulated ombitasvir (25 mg), …

CyclopropanesCompassionate Use TrialsLiver CirrhosisMalechemistry.chemical_compound0302 clinical medicine2-NaphthylamineHCV direct-acting antiviral mixed cryoglobulinemia RBVAnilides030212 general & internal medicineLongitudinal StudiesProspective StudiesChronicAdult; Aged; Anilides; Antiviral Agents; Carbamates; Compassionate Use Trials; Drug Therapy Combination; Female; Genotype; Hepatitis C Chronic; Humans; Liver Cirrhosis; Longitudinal Studies; Macrocyclic Compounds; Male; Middle Aged; Prospective Studies; Ribavirin; Ritonavir; Sulfonamides; Treatment Outcome; UracilSettore MED/12 - GastroenterologiaSulfonamidesDasabuvirHCV DAAGastroenterologyvirus diseasesValineMiddle AgedSettore MED/07 - Microbiologia e Microbiologia ClinicaHepatitis CTreatment OutcomeGastroenterology; HepatologyCombinationDrug Therapy Combination030211 gastroenterology & hepatologyFemalemedicine.drugAdultmedicine.medical_specialtyMacrocyclic CompoundsProlineGenotypeLactams MacrocyclicAdult; Aged; Anilides; Antiviral Agents; Carbamates; Compassionate Use Trials; Drug Therapy Combination; Female; Genotype; Hepatitis C Chronic; Humans; Liver Cirrhosis; Longitudinal Studies; Macrocyclic Compounds; Male; Middle Aged; Prospective Studies; Ribavirin; Ritonavir; Sulfonamides; Treatment Outcome; Uracil; Hepatology; GastroenterologyHepatitis C virus genotype 1 Hepatitis C virus genotype 4 decompensated liver cirrhosis antiviral therapy dasabuvir ombitasvir paritaprevirHepatology; GastroenterologyAntiviral Agents03 medical and health sciencesDrug TherapyInternal medicineRibavirinmedicineHumansDecompensationAdverse effectUracilAgedRitonavirHepatologybusiness.industryRibavirinHepatitis C ChronicVirologyOmbitasvirClinical trialchemistryParitaprevirRitonavirCarbamatesbusiness
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Safety and efficacy of ombitasvir/paritaprevir/ritonavir/dasabuvir plus ribavirin in patients over 65 years with HCV genotype 1 cirrhosis

2018

Purpose: To analyse safety and efficacy of treatment based on ombitasvir/paritaprevir/ritonavir/dasabuvir plus ribavirin in the sub-group of GT1 patients older than 65 years. Methods: We collected data extracted from the ABACUS compassionate-use nationwide Italian programme, in patients with cirrhosis due to hepatitis C virus (HCV) Genotype-1 (GT1) or 4 and at high risk of decompensation. GT1-HCV-infected patients received once-daily ombitasvir/paritaprevir, with the pharmacokinetic enhancer ritonavir (25/150/100 mg) and twice-daily dasabuvir (250 mg) plus Ribavirin (RBV) (OBV/PTV/r + DSV + RBV) for 12 (GT1b) or 24 (GT1a) weeks. Endpoints were to evaluate safety and efficacy, the latter def…

CyclopropanesLiver CirrhosisMaleCirrhosis;Dasabuvir;Elderly;Ombitasvir;ParitaprevirCirrhosis; Dasabuvir; Elderly; Ombitasvir; Paritaprevir; Aged; Aged; 80 and over; Anilides; Antiviral Agents; Biomarkers; Carbamates; Female; Hepacivirus; Hepatitis C; Chronic; Humans; Liver Cirrhosis; Macrocyclic Compounds; Male; Ribavirin; Ritonavir; Sulfonamides; Treatment Outcome; Uracil; Drug Therapy; Combination; GenotypeParitaprevirCirrhosis Dasabuvir Elderly Ombitasvir Paritaprevir Microbiology (medical) Infectious DiseasesCirrhosis; Dasabuvir; Elderly; Ombitasvir; Paritaprevir; Aged; Aged 80 and over; Anilides; Antiviral Agents; Biomarkers; Carbamates; Female; Hepacivirus; Hepatitis C Chronic; Humans; Liver Cirrhosis; Macrocyclic Compounds; Male; Ribavirin; Ritonavir; Sulfonamides; Treatment Outcome; Uracil; Drug Therapy Combination; Genotype; Microbiology (medical); Infectious DiseasesHepacivirusGastroenterologychemistry.chemical_compound0302 clinical medicineElderly2-Naphthylamine80 and overMedicineAnilides030212 general & internal medicineChronicAged 80 and overSulfonamidesDasabuvirValineGeneral MedicineHepatitis CHepatitis CTreatment OutcomeInfectious DiseasesCirrhosisCombination030211 gastroenterology & hepatologyDrug Therapy CombinationFemaleDasabuvirMacrocyclic CompoundCirrhosis; Dasabuvir; Elderly; Ombitasvir; Paritaprevir; Microbiology (medical); Infectious Diseasesmedicine.drugHumanMicrobiology (medical)medicine.medical_specialtyMacrocyclic CompoundsProlineGenotypeLactams MacrocyclicSettore MED/12 - GASTROENTEROLOGIALiver CirrhosiSulfonamideAntiviral Agents03 medical and health sciencesDrug TherapyInternal medicineRibavirinHumansDecompensationUracilAgedHepatitisAntiviral AgentCirrhosiHepaciviruRitonavirbusiness.industryRibavirinSettore MED/09 - MEDICINA INTERNAAnilideBiomarkerHepatitis C Chronicmedicine.diseaseCirrhosis; Dasabuvir; Elderly; Ombitasvir; Paritaprevir; Aged; Aged 80 and over; Anilides; Antiviral Agents; Biomarkers; Carbamates; Female; Hepacivirus; Hepatitis C Chronic; Humans; Liver Cirrhosis; Macrocyclic Compounds; Male; Ribavirin; Ritonavir; Sulfonamides; Treatment Outcome; Uracil; Drug Therapy Combination; GenotypeOmbitasvirOmbitasvirchemistryParitaprevirCarbamateRitonavirCarbamatesbusinessBiomarkers
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Flow-injection spectrophometric determination of propoxur with p-aminophenol

1992

Abstract The spectrophotomeric determination of propoxur [2-(1-methyxlthoxy)phenyl methyl carbamate] was carried out with p -aminophenol (PAP) in a flow system. The method involves the on-line hydrolysis with NaOH of propoxur to 2-isopropoxyphenol and the oxidation of PAP to its relative quinone imine with KIO 4 and the reaction between the phenolate and the quinone imine. A four-channel flow manifold was employed to carry out all the different steps of the reaction considered, monitoring the indo dye formed at 600 nm. The developed procedure provides a typical calibration line of A = 0.000 7 + 1.8 × 10 3 C ( A = absorbance; C = concentration in M) with a regression coefficient of 0.9998 an…

Detection limitChromatographyP-AminophenolIminePropoxurBiochemistryAnalytical ChemistryMethyl carbamateQuinoneAbsorbanceHydrolysischemistry.chemical_compoundchemistryEnvironmental ChemistrySpectroscopyAnalytica Chimica Acta
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