申请人:Japan Tobacco Inc.
公开号:US05468881A1
公开(公告)日:1995-11-21
After the lactone portion of trans-whiskey lactone is hydrolyzed with potassium hydroxide, this portion is reacted with isopropyl bromide and mixed with an alkyl group, thereby obtaining isopropyl (3S,4S)-4-hydroxy-3-methyloctanoate. Then, the isopropyl (3S,4S)-4-hydroxy-3-methyloctanoate is reacted with diethyl azodicarboxylate in the presence of triphenylphosphine and azodicarboxylate, thereby obtaining isopropyl (3S,4S)-4-(3',5'-dinitrobenzoyloxy)-3-methyloctanoate. The isopropyl (3S,4S)-4-(3',5'-dinitrobenzoyloxy)-3-methyloctanoate is hydrolyzed in 2% potassium hydroxide, and as a result, cis-whiskey lactone (A) represented by the following general formula is obtained. According to this method, cis-whiskey lactone, one of the perfume components of whiskey and wine, can be produced selectively and easily. ##STR1##
在使用氢氧化钾水解转化威士忌内酯的部分后,将此部分与异丙基溴反应并与烷基混合,从而获得异丙基(3S,4S)-4-羟基-3-甲氧基辛酸酯。然后,在三苯基膦和双乙酰二肟存在下,将异丙基(3S,4S)-4-羟基-3-甲氧基辛酸酯与双乙酰二肟反应,从而获得异丙基(3S,4S)-4-(3',5'-二硝基苯甲酰氧基)-3-甲氧基辛酸酯。将异丙基(3S,4S)-4-(3',5'-二硝基苯甲酰氧基)-3-甲氧基辛酸酯在2%的氢氧化钾中水解,从而获得以下通式所示的顺式威士忌内酯(A)。使用该方法可以有选择性和容易地生产威士忌和葡萄酒的香料成分之一的顺式威士忌内酯。##STR1##