New approach to the synthesis of dibenzodithia-and benzothiaazacrown ethers via the aromatization of 2-alkylthio(arylthio)cyclohexanes during bromination

A new scheme for the synthesis of dibenzodithiacrown ethers is proposed based on the use of substituted phenol derivatives as intermediates, prepared by aromatization of 2-alkylthio(arylthio)cyclohexanes during bromination. 1,7-Dithia-8,9,17,18-dibenzo-18-crown-6 and 1,10-dithia-11,12,20,21-dibenzo-21-crow-7 without isomers relative to position of the sulfur atoms have been synthesized, and also new thiadiazamacroheterocycles — 1,4,7-trioxa-10,19-dithia-13,16-diaza-12,17-dioxo-8,9,14,15,20,21-tribenzoheneicosane and 1,4,7,10-tetraoxa-13,22-dithia-16,19-diaza-15,20-dioxo-11,12,17,18,23,24-tribenzotetracosane.M. V. Lomonosov Moscow State University, Moscow 119899. M. V. Lomonosov Moscow State Academy for Fine Chemical Technology, Moscow 117571. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 121–127, January, 1997.     

Palladium-catalyzed arylation of acrylic acid by diaryliodonium salts in water

M. V. Lomonosov Moscow State University, 119899 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2685–2686, November, 1992.     

Selective binary mobile phase for high-performance liquid chromatography of 12, 13-epoxytrichothec-9-en-8-ones

M. V. Lomonosov Moscow State University. All-Union Scientific-Research Institute of Veterinary Medicine, Moscow. Translated from Khimiya Prirodnykh Soedinenii, Vol. 6, pp. 861–863, November–December, 1989.     

Palladium-catalyzed cross-coupling of diaryliodonium salts with organotin compounds

M. V. Lomonosov Moscow State University, 119899 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2683–2685, November, 1992.     

Microbiological transformations of 9-amino-1,2,3,4,5,6,7,8-octahydroacridine

Chemistry Faculty, M. V. Lomonosov Moscow State University, Moscow 199899. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 712–713, May, 1994. Original article submitted April 25, 1994     

Microbiological synthesis of 4-hydroxy-5-isopropyl-5-methoxy-2-oxo-2,5-dihydrofuran

M. V. Lomonosov Moscow State University, Moscow 119899, and Chemistry Section, Leipzig University, 7062 Leipzig, Germany. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 711–712, May, 1994.     

Unexpected formation of the most strained δ-lactone in the pyrolysis of diethyl ester of cis-4-hydroxy-trans-5-methoxy-trans-1,2-cyclohexanedicarboxylic acid

Vacuum distillation of diethyl ester of cis-4-hydroxy-trans-5-methoxy-trans-1,2-cyclohexanedicarboxylic acid gave a single compound, 5-ethoxycarbonyl-7-methoxy-2-oxa[2.2.2.]bicyclooctan-3-one. The structure of this -lactone was demonstrated by data of NMR and IR spectroscopy. Calculations using the method of molecular mechanics showed that this structure has the highest steric strains of all possible stereoisomeric -lactones.M. V. Lomonosov Moscow State University, Moscow 119899. M. V. Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow 117571. K. D. Ushinskii Yaroslavl' State Pedagogical University, Yaroslavl' 150000. Translated from Khimiya Geterotsiklicheskaya Soedinenii, No. 1, pp. 41–47, January, 1997.     

Synthesis of substituted pyrrolo[3,2-f]quinolines

Reactions of 2,3,6-trimethyl- and 2,6-dimethyl-6-methoxy-5-aminoindoles with 1,3-dicarbonyl compounds represent a convenient route for obtaining substituted pyrrolo[3,2-f]quinolines, even though the presence of a methoxy group on the benzene ring sometimes lowers the reactivity of the amine, thus increasing the required reaction time and reducing the yield.M. E. Evsev'ev Mordovian State Pedagogical Institute, Saransk 430007. M. V. Lomonosov Moscow State University, Moscow 119899. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1080–1087, August, 1997.     

Synthesis and study of the opioid activities of analogues of β-casomorphin-5

V. I. Lenin Tadzhik State University, Dushanbe. M. V. Lomonosov Moscow State University. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 565–567, July–August, 1990.     

Synthesis and study of opioid activity of modified analogues of DAla2, DLeu2-enkephalin

V. I. Lenin Tadzhik State University, Dushanbe. M. V. Lomonosov Moscow State University. Translated from Khimiya Prirodnykh Soedinenii, Vol. 6, pp. 858–859, November–December, 1989.     

2,3-Dimethyl-7-methoxy-6-aminoindole in the synthesis of linear pyrroloquinolines

The possibility of using 2,3-dimethyl-7-methoxy-6-aminoindole for the production of pyrroloquinolines was studied. It was established that the methoxy group at position 7 activates the closure of the pyridine ring with the formation of linearly fused pyrroloquinolines in the Combe reaction, under the conditions of the Vilsmeier reaction and of the thermal cyclization of aminocrotonate, and in the high-temperature cyclization of aminomethylenemalonate.M. E. Evsev'ev Mordvinian State Pedagogical Institute, Saransk. M. V. Lomonosov Moscow State University, Moscow. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 75–79, January, 1997.     

Phase transformations in hydrogen sorption-desorption by hydrides of intermetallic compounds of the CrB structural type

State Institute of the Nitrogen Industry. M. V. Lomonosov State University, Moscow. Translated from Zhurnal Strukturnoi Khimii, Vol. 32, No. 5, pp. 74–81, September–October, 1991.     

Electronic structure and photoelectron spectra of scandium and lutecium acetylacetonates and acetylacetoniminates

Scientific-Research Physicotechnical Institute, Far-East State University. M. V. Lomonosov Moscow State University. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 4, pp. 51–55, July–August, 1990.     

Crystal and molecular structure of 2,4-diphenyl23-(3-phenylpropine-2-yl) -3-azabicyclo[3.3. I] nonane-9-ol

S. M. Kirov Kazakh State University, Chemical Institute for Oil and Natural Salts, Academy of Sciences of the Kazakh SSR, M. V. Lomonsov State University, Moscow. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 1, pp. 192–195, January–February, 1990.     

Crystal and molecular structure of 1,5-diphenyl-3,7-diallyl-3,7-diazabicyclo[3.3.1]nonane-9-one

S. M. Kirov Kazakh State University. Chemical Institute for Oil and Natural Salts, Academy of Sciences of the Kazakh SSR. M. V. Lomonosov State University, Moscow. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 1, pp. 189–192, January–February, 1990.     

Reaction of i-acetyl-2-phenyl-5-hydroxypyrazolidines with alcohols on the surface of adsorbents

A novel method for synthesis of 5-alkoxypyrazolidines on the surface of an adsorbent allows us to obtain derivatives of allyl, tertiary, and chiral alcohols.M. V. Lomonosov Moscow State University, Moscow 119899. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp 1489–1493, November, 1995.     

Thiacrown compounds: Synthesis and properties. (Review)

Data of the last 15 years on the synthesis and properties of various thiacrown compounds containing 2–8 sulfur atoms in the ring are reviewed.M. V. Lomonosov Moscow State University, Moscow, RussiaTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1587–1618, December, 1999.     

Quantum-chemical analysis of the conformational and diastereomeric composition of 1,3-dimethyl-4-(s-phenylethylimino)piperidine

The serniempirical quantum-chemical methods MNDO, AMI, and PM3 are used in a complete conformational analysis of 1,3-dimethyl-4-(S-phenylethylimino)piperidine.M. V. Lomonosov Moscow State University, Moscow, 119899. Translated from Khimiya Geterotsiklicheskikh Soedinenii. No. 3, pp. 359–360, March, 1996.     

Recyclization of 2-oxobenzo[c]pyrrolo[3,2-e]pyrilium perchlorates by acid hydrazides

L. M. Litvinenko Institute of Physical Organic Chemistry and Coal Chemistry, National Academy of Sciences of Ukraine, Donetsk. A. N. Kosygin Moscow State Textile Academy, Moscow. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1691–1692, December, 1995. Original article submitted March 22, 1995.     

Crystal structure of [ZnCl·15-crown-5·H2O]2Zn2Cl6

State Scientific-Research Institute of Chemistry and Technology of Organometallic Compounds. L. Ya. Karpov Scientific-Research Physical Chemistry Institute, M. V. Lomonosov Moscow State University. Translated from Zhurnal Strukturnoi Khimii, Vol. 30, No. 3, pp. 161–164, May–June, 1989.