发明名称 |
Herstellung von Cyclocarbonaten |
摘要 |
Preparation of 4,4-disubstituted 5-methylene-1,3-dioxolan-2-one derivatives of formula (I) involves reaction of the corresponding 3,3-disubstituted prop-1-yn-3-ol of formula (II) with carbon dioxide in the presence of a quaternary ammonium salt or a phosphonium salt as catalyst. The novelty is that a silver salt is used as co-catalyst. R1,R2 = saturated or olefinic unsaturated aliphatic group or aromatic group; or R1+ R2 = (CH2)4 or (CH2)5. |
申请公布号 |
DE59711070(D1) |
申请公布日期 |
2004.01.15 |
申请号 |
DE1997511070 |
申请日期 |
1997.10.11 |
申请人 |
F. HOFFMANN-LA ROCHE AG, BASEL |
发明人 |
GRUENDLER, HANSJOERG;HANSEN, HANS-JUERGEN |
分类号 |
B01J31/02;C07B61/00;C07D317/36;C07D317/72;(IPC1-7):C07D317/36 |
主分类号 |
B01J31/02 |
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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