Production process of cyclohexenyl ketones

The present invention relates to a production process of intermediate starting materials used for perfumery, more specifically, 2-cyclohexenyl methyl ketones (1b) and 1-cyclohexenyl methyl ketones (1c), or mixtures thereof. An economical process for producing (2- and/or 1-)cyclohexenyl methyl ketone...

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Bibliographic Details
Main Authors Watanabe, Shinya, Ujihara, Hideo, Yamamoto, Takeshi, Hagiwara, Toshimitsu
Format Patent
LanguageEnglish
Published 23.11.2004
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Summary:The present invention relates to a production process of intermediate starting materials used for perfumery, more specifically, 2-cyclohexenyl methyl ketones (1b) and 1-cyclohexenyl methyl ketones (1c), or mixtures thereof. An economical process for producing (2- and/or 1-)cyclohexenyl methyl ketones which are intermediates for the synthesis of - or -damascone. In the presence of a catalyst, a 3-cyclohexenyl methyl ketone represented by the following formula (1a): wherein, R, Rand Reach independently represents a hydrogen atom or a methyl group and at least two of R, Rand Rare methyl groups, is isomerized.