trans 2 butene after hydroxylation with performic acid gives
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Hydroxylation of alkenes
Dihydroxylated products (glycols) are obtained by reaction with aqueous potassium permanganate (pH > 8) or osmium tetroxide in pyridine solution. Both reactions appear to proceed by the same mechanism (shown below); the metallocyclic intermediate may be isolated in the osmium reaction.
dimethylcinnamamide gave unexpectedly a 40:60 mixture of both diastereomers, the threo form being predominant.
Answer:Attempts to prepare dl-erythro-N,N-dimethyl-2,3-dihydroxy-3-phenylpropionamide by the usual organic peracid hydroxylation of dl-trans-N,N-dimethylcinnama
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