Search results for "Markovnikov's rule"

showing 2 items of 2 documents

Comparative hydroamination of aniline and substituted anilines with styrene on different zeolites, triflate based catalysts and their physical mixtur…

2014

Abstract Catalytic performances of different zeolites (Beta and mordenites), scandium triflate based catalysts, mesoporous UVM-7 encapsulated scandium triflate and physical mixtures prepared under ultrasound irradiation were evaluated in the hydroamination of aniline and substituted anilines with styrene. The performances of these catalysts were controlled by the type of acidity and strength. Thus, the conversion was mainly controlled by the strength of the acid sites and their accessibility, while the selectivity appeared to be controlled by the Lewis/Bronsted type of acidity. Lewis acid catalysts directed the reactions mainly to the formation of the Markovnikov adducts while Bronsted acid…

010405 organic chemistryProcess Chemistry and TechnologyMarkovnikov's rulechemistry.chemical_element010402 general chemistry01 natural sciencesCatalysis0104 chemical sciencesCatalysischemistry.chemical_compoundAnilinechemistryOrganic chemistryScandiumHydroaminationLewis acids and basesBrønsted–Lowry acid–base theoryTrifluoromethanesulfonateApplied Catalysis A: General
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Iodofluorination of alkenes and alkynes promoted by iodine and 4-iodotoluene difluoride

2006

It was found that a mixt. of mol. iodine and 4-iodotoluene difluoride are useful to generate in situ the electrophilic iodine/nucleophilic fluorine (IF) couple that was able to add in a Markovnikov fashion and with prevalent anti-stereoselectivity to various alkenes and alkynes.

Settore AGR/13 - Chimica AgrariaOrganic ChemistryDifluorideMarkovnikov's ruleHalogenationchemistry.chemical_elementGeneral MedicineIodineBiochemistrychemistryDrug DiscoveryPolymer chemistryOrganic chemistryHypervalent iodineElectrophilic iodinationFluoroiodoalkanesFluoroiodoalkenesTetrahedron Letters
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