- BENZYLATED MANNICH BASE CURING AGENTS, COMPOSITIONS, AND METHODS
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Compositions and curing agents comprising a benzylated Mannich base composition. The benzylated Mannich base composition includes a reaction product of (a) a substituted phenolic compound having at least one substituent of formula (I): wherein R1 is each independently a linear or branched alkyl group having 1 to 4 carbon atoms, and R2 is hydrogen, methyl, ethyl or phenyl, with (b) a benzylated polyalkylene polyamine (II): wherein RA is substituted or unsubstituted benzyl; RB is each independently RA, or a hydrogen atom, or a group selected from C1-C16 linear, cyclic, and branched alkyl, alkenyl, and alkaryl groups; X, Y, and Z are independently selected from C2-C10 alkylene, and cycloalkylene groups; y is an integer from 0 to 7, and z is an integer from 0 to 4; and, optionally, (c) a multifunctional amine. Amine-epoxy compositions and articles produced from these compositions are also disclosed.
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Paragraph 0139; 0140
(2017/09/08)
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- TRANSAMINATION OF NITROGEN-CONTAINING COMPOUNDS TO MAKE CYCLIC AND CYCLIC/ACYCLIC POLYAMINE MIXTURES
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A transamination process is described to prepare polyamine product mixtures from reactants comprising mixed nitrogen-containing compounds with binary carbon spacing between nitrogen-containing groups (a binary component). A second nitrogen-containing component with a second carbon atom spacing between nitrogen-containing groups may also be employed. The molar ratio between the binary and second components can be adjusted to customize the product composition for desired end uses.
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Page/Page column 18-20
(2012/05/31)
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- Selective Manufacture of N,N'-BIS(Cyanoethyl)-1,2-Ethylenediamine and N, N'-BIS(3-aminopropyl)-1,2-Ethylenediamine
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A method for making N,N′-bis(3-aminopropyl)-1,2-ethylenediamine which comprises reacting acrylonitrile and ethylenediamine in about a 2:1 molar ratio to make a N,N′-bis(cyanoethyl)-1,2-ethylenediamine reaction product and hydrogenating the reaction product, the improvement for improving the selectivity of the reactions to N,N′-bis(2-cyanoethyl)-ethylenediamine and to N,N′-bis(3-aminopropyl)-1,2-ethylenediamine which comprises reacting acrylonitrile and ethylenediamine in the presence of 2-30 wt % water, based on total reactants.
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Page/Page column 3-4
(2008/12/07)
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- First unequivocal synthesis of 1 or 8-N-monosubstituted 1,4,8,12-tetraazacyclopentadecane
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A novel method derived from Kaden's modification of the Richman and Atkins's cyclization using tosylated synthons allows the unequivocal synthesis of 1 and 8-monofunctionalized 1,4,8,12-tetraazacyclo-pentadecane. Both syntheses are described.
- Granier, Colin,Guilard, Roger
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p. 1197 - 1208
(2007/10/02)
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- NUCLEOPHILIC CLEAVAGE AND FORMATION OF SATURATED HETEROCYCLES. XII. REACTIVITY OF SMALL HETEROCYCLES TOWARD AMINOLYSIS AND HYDROLYSIS
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The cleavage of four-membered saturated heterocycles proceeds via a more product-like transition state than that of three-membered rings.General acid catalysis is characteristic of oxygen heterocycles, but in the case of nitrogen heterocycles catalysis is specific.The reactivity of amines in the cleavage of azetidines is linearly dependent on their pKa values, primary and secondary amines comprising separate reaction series.
- Bobylev, V. A.,Veselkov, N. Yu.,Dalin, A. R.,Sharikov, F. Yu.
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p. 1700 - 1713
(2007/10/02)
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- CATALYTIC ALKYL GROUP EXCHANGE REACTION OF PRIMARY AND SECONDARY AMINES.
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It has been shown that primary and secondary amines undergo alkyl group exchange reactions upon treatment with palladium catalyst as depicted in an operationally simple and efficient reaction which provides a convenient method for synthesis of unsymmetrical amines. The application of the reaction for the preparation of various substituted amines and heterocyclic compounds such as hexahydropyrimidine tetrahydropyrimidine, imidazolidine, and imidazoles is described. The preparation of polyamines such as H//2N(CH//2)//mNH(CH//2)//nNH//2 (10) and H//2N(CH//2)//lNH(CH//2)//mNH(CH//2)//nNH//2 (l-n, equals 2,3; 11) is readily performed by the appadium-catalyzed reactions of azetidine (6) and aziridine (7) via azetine (9) and azirine intermediates. The mechanism the palladium-catalyzed reaction has been extensively studied on the carbonylation, racemization, and deuteurium-exchange reaction of (S)-( minus )- alpha -phenylethylamine (17).
- Murahashi,Yoshimura,Tsumiyama,Kojima
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p. 5002 - 5011
(2007/10/02)
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