文献类型：专利

英文题名：Methyl exaltone preparation comprises reacting dibromodecane and acetylacetic ether to obtain hexadecyl diketone in the presence of inorganic base and phase transfer catalyst

作者：FANG Y;DONG X;WANG N

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY;[2]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN101298413-A

申请日：2008-06-26

公开日：2008-11-05

语种：英文

收录：DERWENT

摘要：NOVELTY - A 3-methyl exaltone is prepared by reacting 1,10-dibromodecane and acetylacetic ether to obtain hexadecyl diketone-(2, 15) in the presence of inorganic base and phase transfer catalyst; and cyclizing and hydrogenating the hexadecyl diketone-(2, 15) in the presence of catalyst. The reaction between 1,10-dibromodecane and acetylacetic ether is performed in non-protonic polar solvent. USE - Method for preparation of 3-methyl exaltone (claimed). ADVANTAGE - The method has simple process steps and high yield coefficient, and provides ketone compound with higher commercial value. DETAILED DESCRIPTION - Preparation of 3-methyl exaltone involves reacting 1,10-dibromodecane and acetylacetic ether to obtain hexadecyl diketone-(2, 15) in the presence of inorganic base and phase transfer catalyst; and cyclizing and hydrogenating the hexadecyl diketone-(2, 15) in the presence of catalyst. The phase transfer catalyst is a compound of formula (R1)(R2)(R3)N+-R4 X-. The reaction between 1,10-dibromodecane and acetylacetic ether is performed in non-protonic polar solvent. R1-R4=1-25C alkyl or H;and X=F, Cl, Br, or I. With the proviso that the sum of carbon in R1-R4 is 12-25.