发明名称 |
Preparation of alcohol-extended and amine-extended piperazines |
摘要 |
A process for preparing alcohol-extended and amine-extended piperazines comprising contacting a difunctional aliphatic alcohol with a reactant amine, wherein at least one of the aliphatic alcohol or the reactant amine contains a piperazine moiety, in the presence of a catalyst containing a tungsten heteropoly acid. For example, monoethanolamine reacts with piperazine in the presence of a 12-tungstophosphoric acid catalyst to yield predominantly N-(2-aminoethyl)piperazine, which is an amine-extended piperazine.
|
申请公布号 |
US4983735(A) |
申请公布日期 |
1991.01.08 |
申请号 |
US19880221710 |
申请日期 |
1988.07.20 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
HARTWELL, GEORGE E.;BOWMAN, ROBERT G.;MOLZAHN, DAVID C. |
分类号 |
C07D241/04;C07D295/088;C07D295/13 |
主分类号 |
C07D241/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|