发明名称 |
Preparation of gamma-pyrones |
摘要 |
2-Methyl-3-hydroxy-4H-pyran-4-one is prepared by contacting 1(2-furyl)-1-ethanol in aqueous solution with two equivalents of a halogen oxidant at room temperature and then heating until the hydrolysis of the formed 4-halo-dihydropyran intermediate is substantially complete. Other valuable related gammapyrones are prepared in analogous manner from appropriate alcohols.
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申请公布号 |
US4323506(A) |
申请公布日期 |
1982.04.06 |
申请号 |
US19790072057 |
申请日期 |
1979.09.04 |
申请人 |
PFIZER INC. |
发明人 |
BRENNAN, THOMAS M.;BRANNEGAN, DANIEL P.;WEEKS, PAUL D.;KUHLA, DONALD E. |
分类号 |
C07D309/32;C07D309/40;(IPC1-7):C07D309/22 |
主分类号 |
C07D309/32 |
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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