Cis-configurational unsaturated ester, process for producing the same, and fragrance composition containing the same
申请人:Kuraray Co., Ltd.
公开号:EP0950652A1
公开(公告)日:1999-10-20
The present invention provides a cis-configurational unsaturated ester represented by the formula (1)
(where R is a methyl group or a phenyl group, and n is 1 or 2)
and also provides a fragrance composition containing the cis-configurational unsaturated ester in an effective amount. The cis-configurational unsaturated ester represented by the formula (1) can be produced by
reacting a cyclic vinyl ether represented by the formula (2a)
(where n is defined as above) with a Grignard reagent represented by the formula (3a)
RMgX (3a)
(where R is defined as above, and X is a chlorine atom, a bromine atom or an iodine atom)
in the presence of a triarylphosphine and not more than 0.05 mol of a nickel compound per one mole of the cyclic vinyl ether represented by the formula (2a) to give a cis-configurational unsaturated alcohol represented by the formula (4a)
(where n and R are defined as above); and
subjecting this cis-configurational unsaturated alcohol to acylation with acetic acid or a derivative thereof to give the cis-configurational unsaturated esters represented by the formula (1).
本发明提供了一种顺式构型不饱和酯,由式(1)表示
(其中 R 为甲基或苯基,n 为 1 或 2)。
并提供了一种含有有效量顺式结构不饱和酯的香料组合物。由式(1)代表的顺式构型不饱和酯可通过以下方法制得
使式(2a)代表的环乙烯基醚反应
(其中 n 的定义同上)与式 (3a) 所代表的格氏试剂反应制得
RMgX (3a)
(其中 R 的定义同上,X 为氯原子、溴原子或碘原子)
在三芳基膦和每 1 摩尔式(2a)所代表的环乙烯基醚中含有不超过 0.05 摩尔镍化合物的情况下,生成式(4a)所代表的顺式构型不饱和醇
(其中 n 和 R 的定义同上);以及
将顺式构型不饱和醇与乙酸或其衍生物进行酰化,得到式(1)代表的顺式构型不饱和酯。