- N,N,N'-trimethyl-N'-aminopropyldiaminoethylether
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The invention provides two synthetic methods for technologically producing a novel polyurethane catalyst N,N,N'-trimethyl-N'-aminopropyldiaminoethylether. A method I is characterized by using trimethyldiaminoethylether as a raw material to react with acrylonitrile, then hydrogenating the product under the condition of catalysts including skeletal nickel, palladium-carbon, platinum-carbon, ruthenium-carbon, and the like, and carrying out separation, thus obtaining the target product. A method II is characterized by condensing dimethylethanolamine and N-methyl-N-aminopropylethanolamine and carrying out separation, thus obtaining the target product.
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Paragraph 0021-0022; 0023; 0024; 0025
(2018/02/04)
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- PROCESS FOR THE PRODUCTION OF AMINOPROPYLMETHYLETHANOLAMINE
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A new process for the production of APMMEA (aminopropylmethylethanolamine) is proposed. This process comprises at least 2 steps in which MEAPN (monomethylethanolaminopropionitrile) is first produced from MMEA (monomethylethanol amine) and ACN (acrylonitrile) and then said MEAPN is hydrogenated to obtain the corresponding amine, the APMMEA compound. APMMEA may be then eventually purified by several known process, notably by distillation.
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Page/Page column 5
(2013/08/28)
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- Synthesis and DNA-Sequence Selectivity of a Series of Mono- and Difunctional 9-Aminoacridine Nitrogen Mustards
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The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions.A series of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units.The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N7 positions in a DNA sequence.All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater.The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N7 alkylation.The degree of DNA-sequance selectivity increased as the spacer-chain length decrease below four methylene units.Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, whereas this reaction was almost completely suppressed when the spacer length was reduced to two or three methylenes.Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.
- Kohn, Kurt W.,Orr, Ann,O'Connor, Patrick M.,Guziec, Lynn James,Guziec, Frank S.
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