发明授权
- 专利标题： Preparation of 3-(2'-oxyethyl)dihydro-2(3H)furanones
- 专利标题（中）： 制备3-（2'-氧乙基）二氢-2（3H）呋喃酮
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申请号： US120439申请日： 1993-09-14
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公开(公告)号： US5350863A公开(公告)日： 1994-09-27
- 发明人: Thomas Kuekenhoehner , Norbert Goetz , Rolf Fischer , Werner Schnurr , Dirk Borchers
- 申请人： Thomas Kuekenhoehner , Norbert Goetz , Rolf Fischer , Werner Schnurr , Dirk Borchers
- 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： DEX4231297 19920918
- 主分类号： C07D307/33
- IPC分类号： C07D307/33 ; C07D307/20
摘要：
A process for preparing 3-(2'-oxyethyl)dihydro-2(3H)furanones of the general formula I ##STR1## where R.sup.1 is hydrogen or acetyl, by reacting ethylene oxide with acetoacetic acid esters of the general formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, which comprises carrying out the reaction in alcoholic solutions in the presence of alkali metal alkoxides at from 20.degree. to 100.degree. C. and from 1 to 20 bar, is described.
公开/授权文献
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