发明授权
- 专利标题: Preparation of fatty acid esters of ascorbic acid
- 专利标题(中): 抗坏血酸脂肪酸酯的制备
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申请号: US762031申请日: 1985-08-02
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公开(公告)号: US4705869A公开(公告)日: 1987-11-10
- 发明人: Helmut Nickels , Alfred Hackenberger
- 申请人: Helmut Nickels , Alfred Hackenberger
- 申请人地址: DEX Ludwigshafen
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DEX Ludwigshafen
- 优先权: DEX3308922 19830312
- 主分类号: C07D307/62
- IPC分类号: C07D307/62
摘要:
Fatty acid esters of ascorbic acid are prepared by a process in which a homogeneous mixture of(a) ascorbic acid,(c) concentrated sulfuric acid having a concentration of not less than 96% and(c) a methyl or ethyl ester of a fatty acid of 12 to 18 carbon atomsis reacted at from 20.degree. to 50.degree. C.Using the novel process, the fatty acid esters of ascorbic acid, in particular ascorbyl palmitate, which are very desirable antioxidants are obtained by a procedure which is technically simpler and hence cheaper than the conventional processes, but in equally good yields.
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