发明名称 |
Preparation of N-substituted imidazolidinones and N-substituted 2-thionimidazolidinones |
摘要 |
The invention is a process for the preparation of N-substituted imidazolidinones and N-substituted 2-thionimidazolidinones which comprises contacting an oxazolidinone with a compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group in the presence of a Lewis acid catalyst or the hydrate of a Lewis acid catalyst under conditions such that an N-substituted imidazolidinone or N-substituted 2-thionimidazolidinone is prepared. The compound containing a nitrogen directly bonded to a carbonyl or a thiocarbonyl group is an isocyanate or isothiocyanate or a compound wherein the nitrogen is reactive and the carbonyl or thiocarbonyl group is further bonded to a substituent by a bond which is clevable under the reaction conditions. The Lewis acid catalyst corresponds to the formula MXn wherein M is a group IB-VIIIB, IIIA or IVA element with the proviso that M is not C or Si; X is a halogen; and n is 2, 3 or 4.
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申请公布号 |
US4642351(A) |
申请公布日期 |
1987.02.10 |
申请号 |
US19830459432 |
申请日期 |
1983.01.20 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
WOO, EDMUND P.;PRICE, DIANA R. |
分类号 |
C07D233/32;C07D233/42;(IPC1-7):C07D233/36 |
主分类号 |
C07D233/32 |
代理机构 |
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代理人 |
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地址 |
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