ChemInform Abstract: Gas-Phase Catalytic Asymmetric Reaction Using Chirally Modified Microporous Catalysts.
Abstract
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ChemInform Abstract
It is shown that the dehydration of 2-butanol with a modified zeolite instead of a normal zeolite gives alkenes such as (II)-(IV) under milder conditions. A similar experiment with a zeolite, modified with the (R)-enantiomer of 1,3-dithiane 1-oxide, shows clearly a preference in the reaction of (S)-butan-2-ol over its (R)-enantiomer in the dehydration reaction of the racemic 2-butanol. This first example of an enantioselective gas-phase reaction on a modified heterogeneous catalyst may be of more general interest. Some mechanistical aspects are discussed using computer simulation studies.
