Web Release Date: February 4,
Efficient Catalytic Deoxygenation of Epoxides Using [Tris(3,5-dimethylpyrazolyl)hydridoborato]rhenium Oxides
Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003
Received November 22, 1999
Abstract:
In situ reduction of Tp'ReO3 (Tp' = tris(3,5-dimethylpyrazolyl)hydridoborate) using triphenylphosphine or triethyl phosphite allows generation of a
reduced rhenium species that catalyzes efficient O atom
transfer from epoxides to the stoichiometric phosphorus
reductant at 75-105 
C. The reaction is stereospecific
and proceeds most rapidly with cis- vs trans-alkenes. The
choice of ligand is shown to impart advantages to design
of the catalytic cycle.
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