申请人:International Flavors & Fragrances Inc.
公开号:US04010207A1
公开(公告)日:1977-03-01
A process is described for the preparation of alpha substituted unsaturated aldehydes according to the reaction: ##STR1## wherein one of the dashed lines is a double bond and the other of the dashed lines is a single bond; wherein R.sub.1 is allyl or benzyl, R.sub.2 is one of alkyl, aryl, alkenyl or alkoxyalkyl and R.sub.3 and R.sub.4 are each hydrogen or alkyl, with the proviso that when R.sub.3 is alkyl the dashed line between the .beta. carbon atom and the .gamma. carbon atom represents a double bond and when R.sub.3 is hydrogen, either of the dashed lines is a double bond, wherein X is chloro or bromo, and wherein M is alkali metal, the reaction being carried out (1) using a phase transfer agent, and (2) in a two phase system. Also described is the novel compound, 2,4,7-trimethyl-2,6-octadienal having uses in altering, modifying or enhancing the organoleptic properties of foodstuffs, perfume compositions and perfumed articles.
本发明涉及一种制备α-取代不饱和醛的方法,该方法根据以下反应进行:##STR1## 其中虚线之一是双键,另一虚线是单键;其中R.sub.1是烯丙基或苄基,R.sub.2是烷基、芳基、烯基或烷氧基烷基之一,R.sub.3和R.sub.4各自是氢或烷基,但当R.sub.3是烷基时,β碳原子和γ碳原子之间的虚线表示双键,当R.sub.3是氢时,任何一条虚线均为双键,其中X是氯或溴,M是碱金属,该反应是在(1)使用相转移剂和(2)两相系统中进行的。本发明还涉及一种新化合物2,4,7-三甲基-2,6-辛二烯醛,其用途是改变、修饰或增强食品、香水组合物和香水制品的感官特性。