Alkaloids of Aconitum coreanum. III. 13-Acetyl-14-hydroxy-2-isobutyrylhetisine N-oxide

It has been established by the x-ray structural method that a new alkaloid isolated from the epigeal part ofAconitum coreanum has the structure of 13-acetyl-14-hydroxy-2-isobutyrylhetisine N-oxide. This is the first time that a N-oxide has been isolated among the hetisine alkaloids.Institute of the Chemistry of Plant Substances, Uzbek SSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 378–383, May–June, 1990.     

A study of the alkaloids of Kirghiz opium

Summary Morphine, codeine, narcotine, thebaine, papaverine, protopine, xanthaline, prophyroxine, bases with mp 267 and 263°C,l-canadine, and cryptopine have been isolated from Kirghiz opium.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 711–713, November–December, 1970.     

Dimeric quinoline alkaloids

The review is denoted to an analysis of the literature on the investigation of dimeric quinoline alkaloids, which are divided into four groups depending on the structures of the terpenoid moiety. The natural sources, structures, stereochemical features, possible biogenetic schemes of formation, and methods of synthesizing the alkaloids of this group are considered.Institute of the Chemistry of Plant Substances, USSR Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 4–18, January–February, 1989.     

Mass and NMR spectra of haplophyllidine and perforine and of their derivatives

Conclusions The mass and NMR spectra of haplophyllidine, perforine, and their derivatives have been studied. The influence of the open and cyclic forms of the molecular ion on the nature of the fragmentation has been discussed. The main routes of fragmentation of the compounds considered are due to the presence of substituents at C₈ and C₄.Khimiya Prirodnykh Soedinenii, Vol. 5, No. 4, pp. 273–279, 1969     

Crystal and molecular structure of anhydroperforine

A complete x-ray structural investigation has been made of the alkaloid anhydroperforine. The crystals are rhombic: a=17.425(5) Å, b=8.166 Å, c=11.284(5) Å, z=4, space group P2₁2₁2₁ (diffractometer, 1000 reflections, MLS in the anisotropic approximation, R=0.11). The investigation has unambiguously demonstrated the conformation of the anhydroperforine molecule and has confirmed its structure. The lengths of the bonds and the values of the valence angles are the usual ones. The conformations of rings B and C are planar, ring D has a chair, and ring A, a distorted half-chair conformation.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 805–810, November–December, 1979.     

Thermochemical properties of new N,O-chelate Sc, Eu, and Tb complexes for OLED-devices

A new class of Sc, Eu, and Tb complexes with N,O-chelate ligands was synthesized for the first time. The mass spectra, thermogravimetric analysis, differential scanning calorimetry data, as well as the data on the saturated vapor pressure of the compounds were obtained. The main thermochemical parameters of the compounds were calculated.     

Alkaloids ofHaplophyllum foliosum

The alkaloids skimmianine, dubinidine, foliosidine, graveoline, and compounds (I) and (II) have been isolated from the epigeal part of the plantHaplophyllum foliosum Vved. (family Rutaceae). On the basis of the spectral characteristics of (I) and its 0-isopropylidene derivative it has been established that the compound is the alkaloid edulinine. Substance (II) was identified as ferulic acid by direct comparison with an authentic sample. This is the first time that edulinine and ferulic acid have been detected in plants of the genusHaplophyllum.