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Zur Dehydrierung von 1,4‐Dihydroarenen mit Mangan‐Reagentien
Author(s) -
Radtke Rainer,
Heesing Albert
Publication year - 1990
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.19901230331
Subject(s) - chemistry , dehydrogenation , hydrogen atom abstraction , manganese , selectivity , permanganate , kinetic isotope effect , hydrogen , medicinal chemistry , deuterium , inorganic chemistry , organic chemistry , catalysis , physics , quantum mechanics
Hydrogen Transfer Reactions, 14 1) ‐ The Dehydrogenation of 1,4‐Dihydroarenes by Manganese Oxidants Hydrogen abstraction from 1,4‐dihydroarenes by both MnO 2 and the KMnO 4 ‐dicyclohexano‐[18]crown‐6 complex occurs successively. In the first, rate‐determining step one hydrogen is transferred. A synchronous transfer (by cyclic or termolecular pathways), a SET mechanism, or the addition of the permanganate ion to the double bond are not in accord with the large isotope effects. A moderate cis ‐selectivity is found for the abstraction of the second hydrogen by MnO 2 .
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