发明名称 |
FRAMSTELLNING AV 4-HALO-DIHYDROPYRANER |
摘要 |
The gamma-pyrones of formula I in which the symbols have the meaning given in Claim 1 are obtained by a simple and economic "one-pot" process by reaction of a furfuryl alcohol of formula III with at least 2 equivalents of a halogenated oxidising agent, in aqueous solution at a temperature of between -50 DEG and +50 DEG C, and then the reaction mixture is heated until hydrolysis of the intermediate formed is virtually complete. The gamma-pyrones obtained can be used as products which enhance flavour and fragrance in food and cosmetic preparations. <IMAGE> |
申请公布号 |
SE8200520(L) |
申请公布日期 |
1982.01.29 |
申请号 |
SE19820000520 |
申请日期 |
1982.01.29 |
申请人 |
PFIZER |
发明人 |
BRENNAN T M;BRANNEGAN D P;WEEKS P D;KUHLA D E |
分类号 |
A23L1/221;C07D;C07D309/32;C07D309/38;C07D309/40;C11B9/00;(IPC1-7):C07D309/32 |
主分类号 |
A23L1/221 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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