- Mesoporous Aluminosilicates in the Synthesis of N-Heterocyclic Compounds
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Abstract: The catalytic properties of samples of amorphous mesoporous aluminosilicate ASM with different Si/Al molar ratios (40, 80, 160) were studied in the synthesis of practically important pyridines (by the interaction of С2–С5 alcohols with formaldehyde and ammonia, cyclocondensation of acetaldehyde and propionic aldehyde with ammonia), dialkylquinolines and alkyltetrahydroquinolines (by reaction of aniline with C3, C4 aldehydes) and alkyldihydroquinolines (by interaction of aniline with ketones, acetone and acetophenone). It is found that mesoporous aluminosilicate ASM sample with a molar ratio of Si/Al = 40, which has the highest acidity among the studied samples, exhibits the highest activity and selectivity in these reactions.
- Agliullin, M. R.,Bikbaeva, V. R.,Bubennov, S. V.,Filippova, N. A.,Gataulin, A. R.,Grigor’eva, N. G.,Kostyleva, S. A.,Kutepov, B. I.,Narender, Nama
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p. 733 - 743
(2020/02/25)
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- Substituted pyridines and dihydropyridines
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This invention relates to a process of preparing alkylpyridines and N-substituted alkyldihydropyridines from hexahydrotriazines. These products may be further reacted to form other compositions. The products of the reaction are useful as corrosion inhibitors.
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- Triazolo[4,3-d][1,4]benzodiazepine-6-ones
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Compounds having the structure STR1 wherein R1 is hydrogen, alkyl, phenyl, or benzyl; R2 is hydrogen or alkyl; R3 is hydrogen, alkyl, haloalkyl, cyanoalkyl, trifluoromethyl, phenyl, benzyl, STR2 OR --(CH2)n --NR5 R6 ; R4 is hydrogen, halogen, nitro, cyano, trifluoromethyl, alkyl, alkoxy, or alkylthio; R5 and R6 are the same or different and are hydrogen or alkyl or R5 and R6 together with the nitrogen atom to which they are attached form a five or six membered heterocyclic ring; and n is 1, 2, 3 or 4; are useful as anti-inflammatory agents.
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- Conversion of tetrahydropyrimidines to pyridines
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A process of converting 2,3,4,5-tetrahydropyrimidines containing at least 1 hydrogen in the 2-position and at least one methylene group in the 4-position to corresponding pyridines which comprises heating said tetrahydropyrimidines to a temperature sufficiently high to remove ammonia and hydrogen so as to form said pyridines.
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