摘要
以硫代硫酸钠、1,4-二氯丁烷和乙醛为原料,用Bunte Salts法,经过一步操作合成了2-甲基-1,3-二硫环庚烷,其收率为42%。实验表明,当1,4-二氯丁烷与硫代硫酸钠以等摩尔投料时,可减少盐酸用量,并能避免单质硫的析出而影响分离提纯。用IR1、HNMR、MS证实了目标化合物结构,并对2-甲基-1,3-二硫环庚烷的香气进行了鉴定,结果表明2-甲基-1,3-二硫环庚烷具有浓郁的葱蒜气味,其阈值在水中为0.19ppm,在植物油中为12.90ppm。
2-methyl-1,3-dithiocycloheptane were prepared through the aldehyde with Bunte＇s Salts prepared from 1,4-dichlorobutane and sodium thiosulfate. The yield of 2-methyl-1,3-dithiocycloheptane is 42%. The period of reaction is about 15h. The optimum molar ratio of 1,4-dichlorobutane and sodium thiosulfate was 1 ： 1. The structure of 2-methyl-1, 3-dithiocycloheptane were characterized by IR, 1HNMR,MS. The odour of 2-methyl-1,3- dithiocycloheptane was identified , the result showed that it＇s odour is intense onion and garlic fragrance.. The threshold of 1,3-dithiocycloheptane is 0. 19 ppm in water and 12.90 ppm in vegetable oil.
出处
《中国调味品》
CAS
北大核心
2005年第12期23-26,共4页
China Condiment
基金
国家民委重点科研项目(200145)
湖北省教育厅重点项目(2003A007)
