Workup after bromination of an alkene with trimethylphenylammonium tribromide "Bromination of Alkenes. The application of pyridinium, quinolinium, or trimethylphenylammonium tribromide as brominating reagents is known but little used.1Tetra-n-butylammonium tribromide allows easy double bond bromination under...
polyphenylalkene derivatives (stilbene derivatives)Mixtures of NaBr and NaBrO3 in two different ratios have been used for highly stereoselective bromination of alkenes and alkynes, and regioselective bromine substitution at the 伪-carbon of ketones and at the benzylic position of toluene derivatives. The...
Comparatively fast reactions, good yields and the atom economic nature make this environmentally benign reaction an appealing procedure for alkene and alkyne bromination.doi:10.3184/0308234043431393Yongmin ZhangWeiliang BaoTaokei YingScience Reviews LtdJournal of Chemical Research...
BrominationofalkenesBrominationofalkenes––AdditionofBrAdditionofBr22toanalkenetoanalkene––multiplestepprocessmultiplestepprocess––ProceedsthroughabromoniumionintermediateProceedsthroughabromoniumionintermediate––BothcarbonsoftheoriginalC=CendupwithaBrBothcarbonsoftheoriginalC=CendupwithaBrGeneralMechanismCC+Br...
In nucleophilic aromatic substitution, the aromatic ring acts as which of the following? a. a reducing agent b. an electrophile c. a nucleophile d. a carbocation What is the major product of electrophilic addition of HBr to the following alkene? Explain your ch...
The use of an alkene additive as a bromine scavenger provides a convenient synthetic pathway for the synthesis of a wide variety of 3-bromobenzo[b]selenophenes. Reactions can be performed open to air without the use of moisturesensitive reagents, anhydrous solvents, or an inert atmosphere. ...
An Iodine-Functionalized Metal-Organic framework for catalytic alkene brominationMetal-organic frameworksHypervalent iodine reagentsBrominationAn iodine-functionalized metal-organic framework(MOF),UiO-68-I,was synthesized.UiO-68-I showed good catalytic activity for dibromination of alkenes and alkynes with a...
Ebey P. KoshyDepartment of ChemistryJose ZachariasV.N. Rajasekharan PillaiesReactive & Functional PolymersKoshy EP, Zacharias J, Pillai VNR, Poly(N- vinylpyrrolidone)-hydrotribromide: a new gel- type resin for alcohol oxidation and alkene dibromination, React Func Polym, 66, 845-850, 2006....
The use of an alkene additive as a bromine scavenger provides a convenient synthetic pathway for the synthesis of a wide variety of 3-bromobenzo[b]selenophenes. Reactions can be performed open to air without the use of moisture-sensitive reagents, anhydrous solvents, or an inert atmosphere. ...
Functionalized benzo[b]selenophene and selenophenothiophene derivatives are conveniently obtained from commercially available or easily accessible starting materials using in situ-prepared SeBr4 and alkene additives as bromine scavenger.doi:10.1002/chin.201546208Paegle, Edgars...