Synthesis and biological activity of 7-amidinohydroxyalkyltheophyllines

Глушков, Р. Г.; Ovcharova, I. M.; Medvedev, B. A.; Mashkovskii, M. D.

doi:10.1007/bf00766661

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“…138 On refluxing in ethanol, the imidate 6a reacts with hydrochlorides of primary (168) or secondary (169) amines being thus converted into compounds 170 or 171. 139,140 2-Phenyliminopiperidine has been synthesised from the lactone 22a; first, the lactone was converted into the imidate 6a by treatment with dimethyl sulfoxide, and then the latter was made to condense with aniline. A large number of analogous aryliminopiperidines 172 were prepared directly from the lactone 22a by its condensation with arylamines in the presence of POCl 3 .…”

Section: Reactions With Amines and Their Derivativesmentioning

confidence: 99%

2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties

Shvekhgeimer¹

1998

Russ. Chem. Rev.

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We study the influence of the tetragonalization occurring during the martensitic phase transition on the exchange interactions in Ni 2 MnGa Heusler alloy using first-principles calculations in conjunction with the frozen-magnon approximation. We show that the tetragonalization alters only the exchange constants characterizing the Mn-Mn interactions. Calculated Curie temperatures within the random-phase approximation are found to agree with experimental data. Moreover, we study the temperature dependence of the magnetization and the small deviation from the experimental data exactly at the temperature of the phase transition is discussed. Obtained results agree with previous theoretical results using Liechtenstein's formula to calculate the exchange constants and the Monte Carlo simulation technique to estimate the Curie temperature.have studied the exchange constants for the stoichiometric Ni 2 MnGa alloys for three values of the c/a ratio (c/a = 0.95, 1 and 1.25) using Liechtenstein's formula [31,32] while Monte Carlo simulations have been employed to estimate a Curie temperature of 375 K for the cubic austenitic phase [33]. Recently, the same group of authors have studied the exchange constants for the off-stoichiometric alloys both in the austenitic and martensitic phases [34,35], while Ghosh and Sanyal have focused only in the austenitic phase [36].

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Section: Reactions With Amines and Their Derivativesmentioning

confidence: 99%

2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties

Shvekhgeimer¹

1998

Russ. Chem. Rev.

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Synthesis and biological activity of 7-amidinohydroxyalkyltheophyllines

Cited by 1 publication

References 5 publications

2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties

2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties

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Synthesis and biological activity of 7-amidinohydroxyalkyltheophyllines

Cited by 1 publication

References 5 publications

2,3,4,5-Tetrahydropyridine (Δ1-piperideine) and its derivatives. Synthesis and chemical properties

2,3,4,5-Tetrahydropyridine (Δ1-piperideine) and its derivatives. Synthesis and chemical properties

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2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties

2,3,4,5-Tetrahydropyridine (Δ¹-piperideine) and its derivatives. Synthesis and chemical properties