发明名称 |
PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE .ALPHA.-HYDROXYCARBOXYLIC ACIDS |
摘要 |
<p>Process for the preparation of optically active .alpha.-hydroxycarboxylic acids A b s t r a c t The invention relates to a process for the preparation of optically active .alpha.-hydroxycarboxylic acids characterised in that carbamates are first reacted in the presence of a selective base and of a chelateforming diamine to give a carbanion complex compound, this is than dia- or enantioselectively deprotonated, then substituted with CO2 and, as a final step, the heterocyclic protective group is eliminated. Le A 28 839 A- Foreign Countries</p> |
申请公布号 |
CA2085634(A1) |
申请公布日期 |
1993.06.21 |
申请号 |
CA19922085634 |
申请日期 |
1992.12.17 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
MOHRS, KLAUS-HELMUT;CARSTENS, AXEL;HOPPE, DIETER |
分类号 |
C07B53/00;C07C51/06;C07C59/54;C07C59/56;C07C59/72;C07D263/04;(IPC1-7):C07C59/54;C07F7/18;C07C51/377;C07F1/02 |
主分类号 |
C07B53/00 |
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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