Search results for "Aliphatic compound"
showing 3 items of 53 documents
H2-Antihistaminika, 34. Mitt. 1,3,4-Oxadiazol-2,5-diamine mit H2-antagonistischer Aktivität
1987
Es wird uber die Synthese und H2-antagonistische Wirksamkeit von mono- und disubstituierten 1,3,4-Oxadiazol-2,5-diaminen mit Piperidinomethylphenoxypropylseitenkette sowie deren methylierte Derivate berichtet. H2-Antihistaminics, XXXIV: 1,3,4-Oxadiazole-2,5-diamines with H2-Antagonistic Activity Syntheses and H2-antagonistic activities of mono- and disubstituted 1,3,4-oxadiazole-2,5-diamines with a [(piperidinomethyl)phenoxy]propyl substituent and of their methyl derivatives are reported.
Diels-Alder reactions of 1-phenylpyrano[3,4-b]indol-3-ones with alkynes: New functionalized carbazoles
1990
3-Indolylalkanoic acids 2 react with benzoic acid anhydride under catalysis of Et2O - ZnCl2 and mild conditions to furnish the 1-phenyl-substituted pyrano[3,4-b]indol-3-ones 1c, 1d, and 3a, 3b. Products 1c, 1d, and 3b may be converted into the novel functionalized carbazoles 4 and 5 by reaction with acceptor-substituted alkynes.
Determination of basic strenght of aliphatic amines through ion pair formation in some ionic liquid solutions
2010
To have an evaluation of the basic strength of aliphatic amines in ionic liquid solution, the stability constants relevant to the formation of amine/p-nitrophenol ion pairs were determined in different ionic liquids at 298 K. In particular, aliphatic (pyrrolidinium) and aromatic (imidazolium) ionic liquids were used. Imidazolium ions, bmim(+) and bm(2)im(+), having different hydrogen bond donor abilities were taken into account. Anions were chosen ([BF(4)(-)], [PF(6)(-)], and [NTf(2)(-)]; where NTf(2) = bis(trifluoromethansulfonyl)imide) showing different shape, size, and coordination ability. Several primary, secondary (cyclic or not), and tertiary amines were used to study the effect of a…