Berberis alkaloids. XXXVII. Investigation of the alkaloids ofB. oblongata andB. integerrima. Crystal structure of 8-trichloromethyldihydroberberine

Two species of Berberis have yielded 10 isoquinoline alkaloids. In addition to known bases, two artifacts have been isolated — 8-trichloromethyldihydroberberine (I) and 8-trichloromethyldihydropalmatine. An x-ray structural analysis has been made of (1).Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 889–893, November–December, 1996. Original article submitted April 15, 1996.     

Synthetic and modified isoflavonoids. XIII. Synthesis of analogues of fujikinin

Analogues of a natural isoflavone glycoside — fujikinin — have been synthesized. Their structures have been confirmed by their PMR spectra.Taras Shevenko Kiev University: KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 347–351, May–June, 1994.     

Crystal structure of organosilicon compounds. LXIV. Structure of four unsaturated cyclocarbosilanes

An x-ray structural investigation of four permethylcyclocarbosilanes, whose heterocycles are formed by –Si–CH₂–CH₂–, –Si–CH=CH–, and –Si–CC– fragments, has been carried out. Strong distortions of some bond lengths and bond angles (caused by the shortness of the Si...Si distances between the neighboring Si atoms and the absence of intermolecular contancts with the participation of atoms of the heterocycles), which attest to statistical disordering of the molecules in the crystals, whose character could be established unequivocally for three of the compounds, have been observed in all the structures.For part LXIII, see [1].A. N. Nesmeyanov Institute of Organometallic Compounds, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 2, pp. 116–124, March–April, 1991.     

Bisindoles. 18. Some electrophilic substitution reactions in the 1,2-di(indol-5-yl)ethane series

A quantum-chemical calculation has been made and the laws of the electron-density distribution in the molecule of 1,2-di(indol-5-yl)ethane have been determined. The electrophilic substitution reactions most characteristic for it have been studied.For communications 15–17, see [1–3].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 73–77, January, 1984.     

Synthetic analogs of natural flavolignans. II. A new synthesis of benzodioxepane analogs of silandrin and hydnocarpin

Benzodioxepane analogs of chalcones have been obtained from which analogs of natural flavolignans — silandrin and hydnocarpin — have been synthesized. The PMR spectra of the new substances are given and are discussed.KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 480–483, July–August, 1994.     

Synthetic and modified isoflavonoids. I. Synthetic analogues of pseudo-baptigenin

New isoflavones derived from pseudobaptigenin containing alkyl substituents in position 6 have been synthesized. The structures of the compounds have been confirmed by PMR and IR spectroscopies.Taras Shevchenko Kiev University KIEN. and Karakalpak Division. Academy of Sciences of the Republic of Uzbekistan, Nukus. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 669–674, September–October, 1993.     

Phospholipid and fatty acid composition of Echinodermata. I. ClassOphiuroidea

The phospholipid compositions of five species of marine ophiuroids belonging to the classOphiuroidea have been investigated. It has been shown that the phosphatidylethanolamines contain almost solely ether bonds in the first position of the glycerophospholipids. The amount of the plasmalogen form in the phosphatidylethanolamines averages 89.8% (82.3–96.2%) and the amount of the alkyl form 9.8% (3.8–17.7%). The compositions of the fatty acids, fatty aldehydes, and alkyl ethers in the two main classes of phospholipids — phosphatidylethanolamine and phosphatidylcholine — have been studied. The main acids found were eicosatetraenoic and eicosapentaenoic, the total amount of which was 53%. It has been shown that the ophiuroids can be used as promising objects for the investigation of the metabolism of alkoxylipids and for their preparative isolation.Volga Basin Ecological Institute of the USSR Academy of Sciences, Tol'yatti. Translated from Khimya Prirodnykh Soedinenii, No. 5, pp. 547–551, September–October, 1986.     

A mass-spectrometric study of insect pheromones. II. Epoxy compounds

The mass spectra of epoxy compounds have been studied and the positions of the epoxy rings and their configurations have been shown.V. I. Lenin Tashkent State University. A. S. Sadykov Institute of Bioorganic Chemistry, Uzbekistan Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 130–135, January–February, 1992.     

The seed oil of Catalpa. I

Summary 1. The fatty-acid compositions of the seed oils of catalpas cultivated in the Soviet Union have been studied.2. The oil content of the seeds is 21.2–36.7%, the refractive index 1.4905–1.5400, and the iodine number 184.8–201.7.3. The following fatty acids have been found in catalpa oil (%): palmitic — 1.3–4.3; stearic — 1.1–2.5; heneicosanoic — 0.5–5.2; oleic — 5.5–9.8; linoleic — 39.6–50.3; linolenic — 0.4–1.8; and eleostearic — 32.8–46.2.4. The most accurate results for characterizing the degree of unsaturation of the fatty acids of the catalpa seed oils are given by Woburn's method of determining iodine numbers. The iodine numbers obtained experimentally agree with those calculated and consequently the addition of halogen to the system of double bonds takes place at all the double bonds.5. The degree of unsaturation of the fatty acids of catalpa oil characterized by the iodine numbers and refractive indices increases in the sequence of species southern, northern, teas, Chinese and has a tendency to rise on passing to more northerly zones, which is one more piece of evidence confirming the correctness of S. L. Ivanov's climatic theory of the structure of fats.Kalinin Polytechnic Institute. Moscow Branch of the All-Union Scientific-Research Institute of Fats. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 331–337, May–June, 1977.     

Steroid saponins. XIII. The structure of alliumosides D and E fromAllium narcissiflorum

Summary Two new steroid glycosides of the furostanol series have been isolated fromAllium narcissiflorum Wills., and their structures have been shown.Institute of Chemistry, Academy of Sciences of the Moldavian SSR, Kishinev. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 184–188, March–April, 1976.     

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.     

Synthetic and modified isoflavonoids XIX. Synthesis of 8-methyl-substituted analogs of pseudobaptigenin

New 8-methyl-substituted chromones with 1,4-benzodioxane and 1,5-benzodioxepane nuclei in position 3 have been synthesized. Their structures have been confirmed by chemical transformations and PMR spectra.Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 370–374, May–June, 1997.     

Steroid glycosides. XIX. A chemical study of funkiosides E and G from the leaves ofFunkia ovata

Summary 1. Gitogenin, diosgenin, kogagenin, ruscogenin, and tokorogenin have been isolated for the first time fromFunkia ovata Spr.2. Structures of two new steroid glycosides — funkiosides E and G — have been determined.Institute of Chemistry, Academy of Sciences of the Moldavian SSR, Kishinev. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 69–72, January–February, 1977.     

Synthetic and modified isoflavonoids. X. Synthesis of 2-ethyl and 2-propyl homologues of pseudobaptigenin

Homologues of pseudobaptigenin containing ethyl and propyl groups in position 2 have been synthesized. The structures of the new compounds have been comfirmed by PMR.KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistam, Nukus. Taras Shevchenko Kiev University. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 334–337, May–June, 1994.     

Berberis alkaloids. XVII. Investigation of the alkaloids of Berberis heteropoda

The alkaloid composition of young shoots and leaves ofBerberis heteropoda Schrenk has been studied. In addition to known alkaloids, two new ones have been isolated — N-methyldihydroberberine and 8-oxoberberrubine, the structures of which were established by chemical transformations and a study of spectral properties. Of known alkaloids, berbamunine, aromoline, glaucine, thalicmidine, isocorydine, and reticuline have been found in this plant for the first time. Pseudopalmitine and laudanosine have been found for the first time in plants of the genusBerberis.Andizhan State Medical Institute. Institute of the Chemistry of Plant Substances of Uzbek Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 53–59, January–February, 1993.     

Synthetic analogs of natural flavolignans. V. A new synthesis of 6-halogeno-1,3-benzodioxane analogs of silandrin and hydnocarpin

6-Halogeno-1,3-benzodioxane analogs of chalcones have been synthesized by various methods. Flavanone and flavone analogs of silandrin and hydnocarpin have been obtained from them. The structures of the new flavonoids have been shown by their PMR spectra.KIEN Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Taras Shevchenko Kiev University, Ukraine. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 494–498, July–August, 1994.     

Synthetic analogs of natural flavolignans. IV. Synthesis of benzodioxocane analogs of silandrin and hydnocarpin

1,6-Benzodioxocane analogs of chalcones have been synthesized. From them have been obtained benzodioxocane analogs of silandrin and hydnocarpin. The PMR spectra of the substances synthesized are given and are discussed.Taras Shevchenko Kiev University, Ukraine. KIEN, Karakalpak Division, Academy of Sciences of the Republic of Uzbekistan, Nukus. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 490–493, July–August, 1994.     

Synthetic and modified isoflavonoids XVIII. Synthesis of 7-isopropoxy-substituted analogs of pseudobaptigenin

7-Isopropoxy derivatives of isoflavones have been synthesized from 1,3-benzodioxole, 1,4-benzodioxane, and 1,4-benzodioxepane analogs of pseudobaptigenin. Their structures have been confirmed by PMR.Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 365–369, May–June, 1997.     

Synthetic analogs of natural flavolignans VII. Synthesis of 1,3-benzodioxane analogs of dehydrosilybin

Structural analogs of dehydrosilbyn have been obtained from 1,3-benzodioxane derivatives of chalcones. Their structures have been confirmed by their PMR spectra.Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 623–625, September–October, 1994.     

Synthetic analogs of natural flavolignans IX. Synthesis of 3-amino-substituted analogs of hydnocarpin

New 3-amino-substituted chromones with 1,3-benzodioxan and 1,4-benzodioxan nuclei in position 2 have been synthesized. The structures of the compounds obtained have been confirmed by their PMR spectra.Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 178–181, March–April, 1999.