Takasago International Corporation

Mitsuhiko Fujiwhara

Takashi Miura

Toshimitsu Hagiwara

Yoji Hori

Jonathan Warr

Hisao Iwai

Takenobu Nishikawa

Hideo Ujihara

Makoto Emura

Didier Lebret

Stefan Lohmer

A method for producing an optically active 2,3-dihydrofarnesal of formula (1) is disclosed. The method includes subjecting &#x3b2;-farnesene f formula (2) to amination in the presence of a lithium salt of an amine to obtain (2E)-farnesyl allylamine of general formula (3); subjecting the (2E)-farnesyl allylamine to asymmetric isomerization to obtain an optically active farnesyl enamine of general formula (4); and subjecting the optically active farnesyl enamine to solvolysis: 

Method for producing optically active 2,3-dihydrofarnesal

The invention provides a chain diene compound with desirable regioselectivity, in the presence of a specific ruthenium compound. This chain diene compound is a promising raw material for terpene. It has a structure represented by the general formula (I):

Diene compound and process for producing the same

The invention provides a chain diene compound with desirable regioselectivity, in the presence of a specific ruthenium compound. This chain diene compound is a promising raw material for terpene. It has a structure represented by the general formula (IX):

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Kanagawa, Japan

Mitsuhiko Fujiwhara