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Heterogene Gasphasen‐Eliminierungen mit dem System Magnesiumoxid/Kalium
Author(s) -
Maier Günther,
Weber Claudia
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19941271227
Subject(s) - chemistry , dehydrogenation , magnesium , reagent , potassium , benzene , condensation , inorganic chemistry , oxide , cyclohexene , evaporation , medicinal chemistry , photochemistry , organic chemistry , catalysis , physics , thermodynamics
Heterogeneous Gasphase Eliminations with the System Magnesium Oxide/Potassium After evaporation of potassium and condensation on a magnesium oxide surface a highly reactive blue reagent is formed which is active in dehydrogenation reactions. 1,4‐Cyclo‐hexadiene ( 1 ) and 1,3‐cyclohexadiene ( 2 ) can effectively be converted into benzene at room temperature while dehydrogenation of cyclohexene 3 needs temperatures higher than 200°C. The reaction mechanism is discussed. Debrominations with MgO/K can likewise be carried out under rather mild conditions.