Alkylation of cyclic mannich bases, derivatives of thiourea and simple amino acids
摘要:
Aminomethylation of thiourea with aqueous formaldehyde and simple amino acids (glycine, beta-alanine, gamma-aminobutyric acid) have resulted in the formation of (4-thioxo-1,3,5-triazinan-1-yl)-substituted acetic, propionic, and butyric acids, respectively. By alkylation of these compounds corresponding S-methyl and S-ethyl iodides were obtained, and by the action of tert-butylamine, the corresponding salts. The same salts were obtained by the reaction of amine exchange between 5-tert-butyl-1,3,5-triazinan-2-thione and these amino acids in water. As a result of neutralization of S-methyl iodides with tert-butylamine in 2-propanol or aqueous 2-propanol zwitterionic [4-(methyl-sulfanyl)-3,6-dihydro-1,3,5-triazin-1(2H)-yl] derivatives of these acids were isolated. From aqueous solutions of S-methyl iodides and tert-butylamine ion associates of the corresponding zwitter-ions and tert-butylammonium iodide have crystallized. The same associates have formed at treating S-methyl iodides with tert-butylamine or diethylamine in the absence of a solvent.
Alkylation of cyclic mannich bases, derivatives of thiourea and simple amino acids
摘要:
Aminomethylation of thiourea with aqueous formaldehyde and simple amino acids (glycine, beta-alanine, gamma-aminobutyric acid) have resulted in the formation of (4-thioxo-1,3,5-triazinan-1-yl)-substituted acetic, propionic, and butyric acids, respectively. By alkylation of these compounds corresponding S-methyl and S-ethyl iodides were obtained, and by the action of tert-butylamine, the corresponding salts. The same salts were obtained by the reaction of amine exchange between 5-tert-butyl-1,3,5-triazinan-2-thione and these amino acids in water. As a result of neutralization of S-methyl iodides with tert-butylamine in 2-propanol or aqueous 2-propanol zwitterionic [4-(methyl-sulfanyl)-3,6-dihydro-1,3,5-triazin-1(2H)-yl] derivatives of these acids were isolated. From aqueous solutions of S-methyl iodides and tert-butylamine ion associates of the corresponding zwitter-ions and tert-butylammonium iodide have crystallized. The same associates have formed at treating S-methyl iodides with tert-butylamine or diethylamine in the absence of a solvent.
Synthesis of new cyclic derivatives of isothiourea, potential inhibitors of NO-synthases
作者:N. N. Martinovich、V. V. Abzianidze、V. A. Kuznetsov、S. M. Ramsh
DOI:10.1134/s1070363216040381
日期:2016.4
Nowadays active search for selective inhibitors of nitric oxide synthases (NOS) is going on. NOS inhibitors display a wide range of pharmacological properties [1–3]. Linear and cyclicderivatives of isothiourea have been suggested as promising selective NOS inhibitors [5–9]. They contain thioamidine fragment RNHC(SR)=NR which is isosteric to the guanidine group of L-arginine. Under the effect of the
Alkylation of cyclic mannich bases, derivatives of thiourea and simple amino acids
作者:Minyan Song、S. M. Ramsh、V. S. Fundamensky、S. Yu. Solov’eva、V. I. Zakharov
DOI:10.1134/s1070363212020132
日期:2012.2
Aminomethylation of thiourea with aqueous formaldehyde and simple amino acids (glycine, beta-alanine, gamma-aminobutyric acid) have resulted in the formation of (4-thioxo-1,3,5-triazinan-1-yl)-substituted acetic, propionic, and butyric acids, respectively. By alkylation of these compounds corresponding S-methyl and S-ethyl iodides were obtained, and by the action of tert-butylamine, the corresponding salts. The same salts were obtained by the reaction of amine exchange between 5-tert-butyl-1,3,5-triazinan-2-thione and these amino acids in water. As a result of neutralization of S-methyl iodides with tert-butylamine in 2-propanol or aqueous 2-propanol zwitterionic [4-(methyl-sulfanyl)-3,6-dihydro-1,3,5-triazin-1(2H)-yl] derivatives of these acids were isolated. From aqueous solutions of S-methyl iodides and tert-butylamine ion associates of the corresponding zwitter-ions and tert-butylammonium iodide have crystallized. The same associates have formed at treating S-methyl iodides with tert-butylamine or diethylamine in the absence of a solvent.