11033-64-0Relevant academic research and scientific papers
Antiarrhythmic agents based on diterpenoid alkaloid lappaconitine. Protonation of N-deacethyllappaconitine in methanol solutions
Akhiyarov, A. A.,Gabbasov, T. M.,Ivanov, S. P.,Lobov, A. N.,Sadikov, A. Z.,Sagdullaev, Sh. Sh.,Spirikhin, L. V.,Tsyrlina, E. M.,Valiev, N. V.,Yunusov, M. S.
, p. 567 - 571 (2020)
The data on antiarrhythmic drugs based on diterpene alkaloid lappaconitine are summarized. N-Deacetyllappaconitine is the main metabolite of allapinin and a potential antiarrhythmics for intravenous use. The basicity of two nitrogen atoms of this compound and the possibility of obtaining mono- and di-salts with the example of hydrochlorides and hydrobromides having good solubility in water have been studied. It was shown using NMR spectroscopy and potentiometric titration that in the methanolic solutions the atom N(20) is protonated at the first step (pKb1 = 6.77, 25 °C) in the pH range of 6—7. The nitrogen of the primary aromatic amino group is protonated in the pH range of 2—3 (pKb2 = 2.18, 25 °C).
Study of alkaloids of the Siberian and Altai flora 11. Synthesis of new lappaconitine derivatives
Anferova,Bagryanskaya,Gatilov,Osadchii,Shakirov,Shults,Tolstikov
, p. 2500 - 2506 (2003)
A convenient procedure was developed for the preparation of N-deacetyllappaconitine by acid hydrolysis of lappaconitine. The crystal and molecular structures of by-products of acid hydrolysis of lappaconitine, viz., 14- and 16-demethyl-N-deacetyllappaconi
