| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for preparing 2-cyclopentadecenone at a high yield using fewer reaction steps and under a mild preparation condition, and a method for preparing muscone from 2-cyclopentadecenone prepared by the above method. SOLUTION: The method for preparing 2-cyclopentadecenone comprises a step of causing a 2-substituted cyclopentadecanone represented by formula 1 (wherein R represents -SO<SB>2</SB>R<SP>1</SP>, R<SP>1</SP>represents a methyl group or a tolyl group) to undergo an elimination reaction in the presence of an acid. A 2-4C organic acid that may contain a fluorine atom, a 1-3C alkanesulfonic acid that may contain a fluorine atom, or an arylsufonic acid is preferred as an organic acid to be used in the above reaction. A mineral acid such as sulfuric acid, hydrochloric acid and nitric acid is preferred as an inorganic acid to be used in the above reaction. COPYRIGHT: (C)2008,JPO&INPIT
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