Hydrobromination of alkenes with PBr3/SiO2: a simple and efficient regiospecific preparation of alkyl bromides



Document title: Hydrobromination of alkenes with PBr3/SiO2: a simple and efficient regiospecific preparation of alkyl bromides
Journal: Journal of the Brazilian Chemical Society
Database: PERIÓDICA
System number: 000311021
ISSN: 0103-5053
Authors: 1
Institutions: 1Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro. Brasil
Year:
Season: Oct
Volumen: 12
Number: 5
Pages: 685-687
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract The reaction of several alkenes with 0.4 mol equiv. PBr3/SiO2 in dichloromethane at room temperature gave the alkyl bromides with Markovnikov regiospecificity in 50 - 100% yield and short reaction time. Isoprene at - 8 °C in these conditions gave 1-bromo-3-methyl-2-butene only (54%)
Portuguese abstract A reação de diversos alquenos com 0,4 equiv. mol de PBr3/SiO2 em diclorometano à temperatura ambiente forneceu os brometos de alquila com regiospecificidade Markovnikov em 50 - 100% de rendimento e tempos curtos de reação. O isopreno a - 8 °C nestas mesmas condições forneceu somente o 1-bromo-3-metil-2-buteno em 54%
Disciplines: Química
Keyword: Química orgánica,
Alquenos,
Bromuros,
Adición electrofílica
Keyword: Chemistry,
Organic chemistry,
Alkenes,
Bromides,
Electrophilic addition
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