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Wasserstoffübertragungen, 19. Zur Katalyse von Wasserstoff‐Transfer und 1,5‐H‐Shift durch Rhodium(III)‐chlorid in homogener organischer Phase
Author(s) -
Wehage Hubert,
Heesing Albert
Publication year - 1992
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.19921250133
Subject(s) - chemistry , rhodium , dehydrogenation , catalysis , disproportionation , medicinal chemistry , chloride , homogeneous , hydrogen , homogeneous catalysis , catalytic cycle , photochemistry , organic chemistry , physics , thermodynamics
Hydrogen Transfer Reactions, 19. — The Catalysis of Hydrogen Transfer and 1,5‐H Shift by Rhodium(III) Chloride in Homogeneous Organic Systems In homogeneous solution, partly in the presence of a phase‐transfer catalyst, rhodium(III) chloride catalyzes the disproportionation of 1,3‐cyclohexadiene and to a lesser extent 1,5‐H shifts. In the start phase the catalyst is reduced to the active monovalent state. In these catalytic systems the dehydrogenation proceeds stereoselectively. – This was shown by tracer experiments and isotopes effects using deuterated 1,3‐cyclohexadienes 1a — d , which were synthesized with high isotopomeric purity.