发明名称 |
Multi-stage preparation from aldehydes of medium chain-length secondary aliphatic amines, used e.g. in preparation of lubricant additives, comprises one-pot process to give improved purity and yields |
摘要 |
Preparation of sec. aliphatic amines from medium chain-length aldehydes by catalysed reductive amination with ammonia in a solvent, followed by conversion of the obtained prim. amine to an azomethine and then hydrogenation to a sec. amine is such that the whole reaction is carried out as a one-pot process without isolation of intermediates. Preparation of sec. aliphatic amines from medium chain-length aldehydes by catalysed reductive amination with ammonia in a solvent, followed by conversion of the obtained prim. amine to an azomethine and then hydrogenation to a sec. amine is such that: (a) the whole reaction is effected in a one-pot process without filtration, distillation or other isolation of intermediate; (b) following the prim. amine synthesis the mixture is relaxed to normal pressure to give complete evaporation of the ammonia and solvent; (c) equimolar amounts of prim. amine and aldehyde are used in the sec. amine synthesis; and (d) the final reaction mixture is worked up by filtration and distillation.
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申请公布号 |
DE19935448(A1) |
申请公布日期 |
2001.02.01 |
申请号 |
DE19991035448 |
申请日期 |
1999.07.28 |
申请人 |
DHW DEUTSCHE HYDRIERWERKE GMBH RODLEBEN |
发明人 |
WIECZOREK, FRANK;KONETZKE, GERHARD;SCHMIDT, KLAUS;SCHULTE, MARKUS;KUPIES, DIETER |
分类号 |
C07C209/24;C07C209/52;C07C249/02;(IPC1-7):C07C209/24 |
主分类号 |
C07C209/24 |
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