| 摘要 |
There is provided a process for producing 3,3-dimethyl-2-formylcyclopropanecarboxylic ester of formula (1):wherein R represents an alkyl group, a cycloalkyl group or an optionally substituted aralkyl group,which comprises reacting chrysanthemic acid ester of formula (2):wherein R represents the same meaning as that described above, with hydrogen peroxide in the presence of at least one catalyst selected from tungstic oxide, tungstic acid, tugstate, alkylrhenium trioxide, molybdic oxide, molybdate, a heteropoly acid comprising a hetero atom selected from a phosphorus, boron or silicone atom and a poly atom selected from tungsten or molybdenum and a salt of said heteropoly acid.
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