نتایج جستجو برای: mannich bases
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A series of naphthaldehydes, including a Mannich base, have been investigated by UV-Vis spectroscopy, NMR and theoretical methods to explore their potential tautomerism. In the case of 4-hydroxy-1-naphthaldehyde concentration dependent deprotonation has been detected in methanol and acetonitrile. For 4-hydroxy-3-(piperidin-1-ylmethyl)-1-naphthaldehyde (a Mannich base) an intramolecular proton t...
The title compound, C(23)H(30)N(2)O(4), is a Mannich base useful for studying the effect of an electron-donating phenol substituent on intra-molecular hydrogen bonding. In the mol-ecular structure, the cyclo-hexane ring adopts a chair conformation and the five-membered ring has a twisted envelope conformation. Each meth-oxy group is oriented in the same plane of the respective aromatic ring, sh...
Three new 1,3,4-oxadiazole, 1,3-thiazolidine and 1,2,4-triazole derivatives were obtained starting from furan-2-carbohydrazide. Then, 1,2,4-triazole compound was converted to the corresponding Mannich bases using several secondary amines including piperidine, piperazine, morpholine or thiomorpholine moiety. The synthesis of 5-(furan-2-yl)-4-{[(4-methoxyphenyl)methylidene]amino}-4H-1,2,4-triazol...
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