- The reductive amination of cyclohexanone with 1,6-diaminohexane over alumina B modified Cu-Cr-La/γ-Al2O3
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The reductive amination of cyclohexanone with 1,6-diaminohexane over alumina B modified Cu-Cr-La/γ-Al2O3 was investigated. The experimental results indicated that the doped alumina B remarkably increased the selectivity of N, N′-dicy
- Sun, Meng,Du, Xiaobao,Kong, Xiangjin,Lu, Liang,Li, Yang,Chen, Ligong
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experimental part
p. 58 - 62
(2012/06/16)
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- CHAIN EXTENDERS
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This invention provides chain extender compositions. These compositions comprise aliphatic secondary diamines in which the amino hydrocarbyl groups are different from each other. Processes for producing polyurethanes, polyureas, and polyurea-urethanes using these aliphatic secondary diamines are also provided.
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Page/Page column 13
(2008/12/08)
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- PREPARATION OF SECONDARY DIAMINES
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This invention provides a process for forming secondary diamines. The process comprises bringing together i) at least one aliphatic cyclic ketone, ii) at least one aliphatic primary diamine, iii) hydrogen, and iv) a hydrogenation catalyst. The aliphatic primary diamine is isophoronediamine or an aliphatic primary α,ω-diamine, and the hydrogenation catalyst is selected from platinum on carbon, palladium on carbon, sulfided platinum on carbon, sulfided palladium on carbon, and a mixture of any two of the foregoing. The process is conducted at a temperature in the range of about 200C to about 750C and at a hydrogen pressure in the range of about 1 to about 95 pounds per square inch gauge, such that a secondary diamine is formed.
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Page/Page column 10
(2008/12/07)
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- Allosteric modulators of the tertiary alkanebisamino-type. Variation of the substitution of the middle chain nitrogens
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Synthesis pathways of high flexibility for variously substituted alkanebisamine-type allosteric modulators of muscarinic receptors capable of passing the blood-brain barrier were developed starting either from N,N′-(hexane-1,6-diyl)bistosylamide or adipic
- Pick, Rainer,Duda-Johner, Seraina,Traenkle, Christian,Mohr, Klaus,Holzgrabe, Ulrike
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p. 1539 - 1556
(2007/10/03)
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