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Oxybromination of Ethynylbenzene Catalysed by Molybdenum Complexes in Organic Solvent and in Ionic Liquids
Author(s) -
Conte Valeria,
Floris Barbara,
Galloni Pierluca,
Silvagni Adriano
Publication year - 2005
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.200505114
Subject(s) - ionic liquid , dichloromethane , chemistry , solvent , molybdenum , bromide , ionic bonding , potassium bromide , hydrogen peroxide , inorganic chemistry , organic chemistry , photochemistry , catalysis , ion
The molybdenum(VI)‐catalysed oxybromination of ethynylbenzene was performed with hydrogen peroxide as oxidant and potassium bromide as source of bromine, in a two‐phase water/solvent system, where solvent was either dichloromethane or an ionic liquid. The selectivity was toward 1,2‐dibromostyrene when performed in water/dichloromethane. In ionic liquids better yields and shorter reaction times were obtained that, together with the complete ethynylbenzene conversion and the preferred formation of α,α‐dibromoacetophenone, make the reaction synthetically useful.