Homoaporphine alkaloids fromMerendera robusta

In an investigation of the total alkaloids ofMerendera robusta Bge, family Liliaceae from various growth sites as a promising raw material for obtaining colchamine and colchicine we have isolated for the first time merenderine and the new homoaporphine alkaloids merobustine and merobustinine, the structures of which have been established by chemical and spectral methods as 1,12-dihydroxy-2,10,11-trimethoxyhomoaporphine and 2,11-dihydroxy-1,10,12-trimethoxyhomoaporphine.     

Mass-Spectrometric analysis of homoaporphine bases structure of szovitsinine

Summary The mass spectra of homoaporphine bases have been studied. The main decomposition of these bases is connected with the elimination of the substituent in position C₃.The mass spectrum of the new base szovitsinine has been studied and the structure of 2,4-dihydroxy-3,5,6-trimethoxyhomoaporphine has been proposed as the most probable form of it.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 230–234, March–April, 1977.     

Alkaloids ofRhinopetalum stenantherum. Structure of stenanzidine

Three new alkaloids have been isolated from the combined alkaloids of the epigeal part ofRhinopetalum stenantherum: stenanzidine, stenanzidinine, and stenanzamine.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 341–344, May–June, 1984.     

Alkaloids ofLiriodendron tulipifera

The alkaloids of the tulip treeLiriodendron tulipifera L., family Magnoliaceae, are considered. More then 20 alkaloids have been isolated during different vegetation periods from various organs of the plant growing in Uzbekistan, and these have been assigned to the aporphine alkaloids and their dehydro, oxo, and 7-hydroxy derivatives; only two alkaloids proved to be derivatives of proaphorphine and of tetrahydroberberine. On the basis of the results of a comparative study of the NMR spectra of aporphines unsubstituted in ring D and some chemical transformations, the structure and configuration of the (R)-3-hydroxy-1,2-dimethoxyaporphine have been proposed for the new alkaloid lirinine. The absolute configurations, possible biogenetic interconnections, and mutual transitions of the alkaloids ofL. tylipifera that are derivatives of aporphine, oxoaporphine, and dehydroaporphine are discussed. A summery table is given which includes 41 alkaloids found in this plant.Institute of the Chemistry of Plant Substances of the Uzbek SSR, Academy of Sciences, Tashkent. Tashkent Agricultural Institute. Translated from Khimiya Prirodnykh Soedenii, No. 5, pp. 628–638, September–October, 1987.     

The electrochemical extraction of alkaloids of the pyrrolizidine series from plant raw material. I

Summary 1. Alkaloids of the pyrrolizidine series (platyphylline and seneciphylline) have been isolated by an electrochemical method from the herbSenecio platyphylloides. The amount of alkaloids extracted into the catholyte depends on the current strength and the time of electrodialysis.2. It has been established that the N-oxide forms of the alkaloids are reduced during the dialysis process.Zaporozh'e Medical Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 831–834, November–December, 1977.     

Alkaloids ofCorydalis stricta

The alkaloids of the epigeal part and roots ofCorydalis stricta have been studied. Of the 23 alkaloids isolated, N-methylcorypalline proved to be new, and its structure has been determined. Stilopine hydroxymethylate and pycnarrhine have been isolated from the genusCorydalis for the first time, and cheilanthiofoline isocorypalmine, scoulerine, isoboldine, reticuline, N-methylcoclaurine, coreximine, juziphine, pancorydine, corypalline, wilsonirine, stilopine, adlumidine, dihydrosanguinarine, adlumine, and bicucculine have been isolated from this species of plant for the first time.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 490–493, July–August, 1983.     

Alkaloids ofPapaver orientale

Continuing the separation of the total alkaloids of the plantPapaver orientale L., collected in the flowering phase in the region of Lake Sevan, orientalidine, mecambridine, isothebaine, and bracteoline have been isolated, together with new alkaloids — oreintine, O-methylisothebaine, and orientidine, the structures of which have been established.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 81–83, January–February, 1984.     

Alkaloids ofGlaucium fimbrilligerum. II

The alkaloids of the epigeal part and roots of the plantGlaucium fimbrilligerum have been studied. A total of 18 alkaloids has been isolated, of which epiglaufidine proved to be new, and its structure has been established. Columbamine has been isolated from the genusGlaucium for the first time, and magnoflorine and stilopine -hydroxymethylate from this species of plant for the first time.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Purkinje University, Brno, Czechoslovakia. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 493–496, July–August, 1983.     

Alkaloids ofNitraria komarovii. XV. Vasicinone and deoxyvasicinone N-oxides

Two new alkaloids have been isolated from the epigeal part ofNitraria komarovii — the N-oxides of vasicinone and of deoxyvasicinone. Their structures have been established on the basis of spectral results and chemical transformations.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 580–582, July–August, 1993.     

Quaternary 7-oxo-4,5,6,6a-tetrahydrohomoproaporphine alkaloids ofCochicum kesselringii

On the basis of additional information obtained by PMR and mass-spectral methods and chemical transformations, the structures of regelinone and isoregelinone, isolated fromCochicum kesselringii Rgl., have been established as quarternary 7-oxotetradehydrohomoproaporphine alkaloids.V. I. Lenin Tashkent State University. M. I. Kalinin Turkmen Agricultural Institute. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 81–84, January–February, 1985.     

Alkaloids ofGlaucium fimbrilligerum

From the epigeal part and roots ofGlaucium fimbrilligerum 22 alkaloids have been isolated, of which three have proved to be new — d-isocorytuberine, dehydrocorydine, and corydine N-oxide.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 224–228, March–April, 1980.     

Quantitative determination of the alkaloids ofAnabasis aphylla by thin-layer chromatography

Summary A chromatographic method has been developed for the quantitative determination of the alkaloids ofAnabasis aphylla — anabasine, aphylline, lupinine, aphyllidine, and anabasamine — and also pachycarpine in the mixture of reduction products of the high-boiling fraction of alkaloids, in a thin layer of alumina.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 772–776, November–December, 1976.     

Alkaloids of a new type fromSophora alopecuroides L.

Summary The structures of aloperine and allylaloperine (fromSophora alopecuroides L.) — alkaloids of a new structural type for the genusSophora — have been established by chemical and spectral methods. A number of parameters, NMR spectra, and mass spectra characterizing this class of compounds has been obtained. The partial synthesis of allylaloperine has been performed.All-Union Scientific-Research Institute of Medicinal Plants. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 30–37, January–February, 1975.     

Alkaloids ofNitraria komarovii XVII. Peganine N-oxide, N-allylschoberine, and dehydronitramidine

Three new alkaloids have been isolated from the epigeal part ofNitraria komarovii — peganine N-oxide, N-allylschoberine, and dehydronitramidine. Their structures have been determined on the basis of chemical transformations and spectral results.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 780–783, November–December, 1994.     

Ungernia alkaloids

The review is devoted to the study of the alkaloids of plants of the genusUngernia (Amaryllidaceae). It gives their characteristic reactions and information on the determination of their structures and stereochemistry and on the dynamics of the accumulation of alkaloids in the plants of the genusUngernia. A dependence of the physiological activity of the alkaloids on their structure is shown.Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbek, SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 749–767, November–December, 1980.     

NMR study of alkaloids. V.13C NMR spectra and reconsideration of the structures of 11- and 10-hydroxypleiocarpamines and the structures of new alkaloids fromVinca erecta

The structures of phenolic alkaloids isolated previously fromVinca erecta Rgl. et Schmalh. have been reconsidered on the basis of the results of a study of their¹³C NMR spectra, and it has been shown that a base with mp 228–229° has the structure of 11-hydroxystrictamine and an amorphous base of the same composition isomeric with it is 10-hydroxystrictamine. The structures of two new indolenine alkaloids — ercinamine and ercinaminine — have been determined from an analysis of¹³C NMR spectra, and also on the basis of PMR and IR spectra and chemical transformations.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 483–488, July–August, 1983.     

The structures of juniferin and juniferinin

Summary Two new esters of the new sesquiterpene alcohol juniferol — juniferin and juniferinin — have been isolated from the roots ofFerula juniperina. On the basis of the products of chemical transformations and spectral characteristics the structure of 2,5-dihydroxy-1,1,4,8-tetramethylcycloundeca-3,7-diene has been proposed for juniferol.It has been shown that juniferin is 5-O-vanilloyljuniferol, and juniferinin is 2-O-acetyl-5-O-p-hydroxybenoyljuniferol.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 790–796, November–December, 1977.     

Biosynthesis and metabolism of some matrine alkaloids inGoebelia pachycarpa

Information is given on the biosynthesis, metabolism, and interconversion of a number of matrine alkaloids isolated fromGoebelia pachycarpa. The role of amino acids and other organic acids in the formation of these alkaloids is discussed.V. I. Lenin State University. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 3–12, January–February, 1984.