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Rhenium( VII ) Oxide/Aluminum Oxide: More Experimental Evidence for an Oxametallacyclobutane Intermediate and a Pseudo‐Wittig Initiation Step in Olefin Metathesis
Author(s) -
Salameh Alain,
Copéret Christophe,
Basset JeanMarie,
Böhm Volker P. W.,
Röper Michael
Publication year - 2007
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.200600440
Subject(s) - chemistry , wittig reaction , metathesis , allylic rearrangement , propene , rhenium , salt metathesis reaction , reactivity (psychology) , catalysis , medicinal chemistry , olefin fiber , organic chemistry , photochemistry , polymerization , medicine , alternative medicine , pathology , polymer
Reactivity studies of the rhenium( VII ) oxide/aluminum oxide olefin metathesis catalyst with various olefins show that initiation does not require an olefin with an allylic CH bond, and therefore probably takes place via a pseudo‐Wittig reaction. While it does not react with ethene in the absence of propene, Re 2 O 7 /Al 2 O 3 catalyses the self‐metathesis of Z ‐stilbene and its cross‐metathesis with ethene. Additionally, reaction of Re 2 O 7 /Al 2 O 3 with Z ‐2‐butene followed by 13 C di‐labelled ethene shows that it contains only 2 % of active sites.