Flavouring a foodstuff by incorporating an effective amount of at least one compound of the formula r1-s-r2 in which r1 and r2 represent a specific atom or group
申请人:——
公开号:US20040052914A1
公开(公告)日:2004-03-18
NEW MATERIAL: A compound of formulal(R is 1˜6C alkyl other than ethyl, 2˜6C alkenyl).
EXAMPLE: 2-Methyl 2-mercaptopropionate.
USE: A durable flavor and taste imparting agent usable for foods, drinks, cosmetics, healthy and hygienic use, medicines, etc.
PROCESS: A 2-mercaptopropionic acid of formula II (R′ is H, 1˜6C alkyl or 2˜6C alkenyl) is esterified with an aliphatic alcohol of the formula R′ (OH) in the presence of a catalyst, e.g. an inorganic acid such as sulfuric acid or organic acid such as acetic acid, in an azeotropic solvent, e.g. benzene, at 60˜100° C. to give the compound of formulaleasily in high purity and yield. The molar amount of the aliphatic alcohol to be used is 1˜20 times, preferably 2˜5 times, that of the compound of formula II. The amount of the catalyst to be used is 0.1˜10 wt % based on the compound of formula II.
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新材料:式(R 为 1˜6C烷基,但不包括乙基和 2˜6C烯基)的化合物。
例如:2-巯基丙酸 2-甲酯。
用途:一种可用于食品、饮料、化妆品、健康和卫生用品、药品等的持久性风味剂。
生产过程将式 II 的 2-巯基丙酸(R′为 H、1˜6C 烷基或 2˜6C烯基)与式 R′(OH)的脂肪醇在催化剂存在下(如无机酸(如硫酸)或有机酸(如乙酸)的存在下,在共沸溶剂(如苯)中,于 60 ˜100 ° C 下与式 R′(OH)脂肪醇酯化,即可得到高纯度、高收率的式 R′(OH)化合物。所用脂肪醇的摩尔量是式 II 化合物摩尔量的 1˜20倍,最好是 2˜5倍。催化剂的用量为式 II 化合物的 0.1˜10wt%。
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