Collect. Czech. Chem. Commun. 1982, 47, 2280-2290
https://doi.org/10.1135/cccc19822280

Cyclopropyl→cyclobutyl rearrangement in intramolecular cyclization of 3,5-bridged B-secoandrostane-6,7(or 5,7)-diols and mass spectra of products

Helena Velgová, Jorga Smolíková, Antonín Trka and Antonín Vítek

Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6

Individual author index pages


Other CCCC articles of these authors

  • Jiří Závada, Magdalena Pánková and Antonín Vítek
    On the origin of base concentration effect on stereo- and regioselectivity in alkoxide-promoted E2 reactions: A consequence of substrate solvation by metal ions
    1990, Vol. 55, Issue 3, pp. 695–703 [Abstract]
  • Ladislav Kohout, Helena Velgová, Miroslav Strnad and Miroslav Kamínek
    Brassino steroids with androstane and pregnane skeleton
    1987, Vol. 52, Issue 2, pp. 476–486 [Abstract]
  • Miloš Buděšínský, Antonín Trka, Karel Stránský and Milan Streibl
    Heterocyclic nitrogen-containing compounds from the extract of the springtail Tetrodontophora bielanensis (WAGA)
    1986, Vol. 51, Issue 4, pp. 956–963 [Abstract]
  • Karel Stránský, Antonín Trka, Miloš Buděšínský and Milan Streibl
    Lipidic compounds from the extract of the springtail Tetrodontophora bielanensis (WAGA)
    1986, Vol. 51, Issue 4, pp. 948–955 [Abstract]
  • Helena Velgová
    Participation of the oxygen-containing substituent in alkaline saponification of 3,4a-disubstituted 4,4-dimethyl-5,6β-epoxy-A-homo-5β-cholestane derivatives
    1986, Vol. 51, Issue 4, pp. 930–936 [Abstract]
  • Helena Velgová and Jaroslav Zajíček
    Reaction of 3,4a-disubstituted 4,4-dimethyl-5,6β-epoxy-A-homo-5β-cholestane derivatives with reducing agents
    1985, Vol. 50, Issue 11, pp. 2457–2470 [Abstract]
  • Jiří Závada, Václav Pechanec, Jaroslav Zajíček, Ivan Stibor and Antonín Vítek
    Effects of salt concentration and counterion on stability of alkali ion-18-crown-6 complexes in aqueous and methanolic solution: A conflicting evidence from potentiometric and sodium-23 NMR studies
    1985, Vol. 50, Issue 5, pp. 1184–1193 [Abstract]
  • Zdeněk Jermář, Antonín Vítek, Josef Krupička and Lubomír Šerák
    A simple method of digitalization of polarographic curves. Description of the apparatus
    1985, Vol. 50, Issue 5, pp. 1114–1120 [Abstract]
  • Helena Velgová and Ladislav Kohout
    6,7-Secoandrostane derivatives
    1985, Vol. 50, Issue 4, pp. 962–972 [Abstract]
  • Helena Velgová and Jaroslav Zajíček
    Oxidation and epoxidation of 4,4-dimethyl-A-homo-5-cholesten-4a-ols
    1985, Vol. 50, Issue 1, pp. 114–131 [Abstract]
  • Alexander Kasal and Jorga Smolíková
    Photochemical 6β-hydroxylation of 11β-hydroxy-4-androstene-3,17-dione
    1984, Vol. 49, Issue 12, pp. 2932–2941 [Abstract]
  • Mirko Černý and Antonín Trka
    Formation of sulphur compounds during the hydrodenitrogenation of aniline, cyclohexylamine, benzylamine, and 2-phenylethylamine on a nickel-tungsten catalyst in the presence of hydrogen sulphide
    1984, Vol. 49, Issue 10, pp. 2387–2392 [Abstract]
  • Pavel Drašar, Vladimír Pouzar, Ivan Černý, Jorga Smolíková and Miroslav Havel
    Synthesis of 17β-[4-(1,3-thiazolyl)]androstane 3β-hemisuccinate and glycoside
    1984, Vol. 49, Issue 4, pp. 1039–1050 [Abstract]
  • Karel Bláha, Ahmed M. Farag, Dick VAN DER Helm, M. Bilayet Hossain, Miloš Buděšínský, Petr Maloň, Jorga Smolíková and Miloš Tichý
    Stereoisomeric chiral 2,9-diazabicyclo[4.4.0.]decane-3,10-diones as models of dipeptide grouping: Synthesis, X-ray, IR, NMR and cd studies
    1984, Vol. 49, Issue 3, pp. 712–742 [Abstract]
  • Zdenko Procházka, Michal Lebl, Tomislav Barth, Jan Hlaváček, Antonín Trka, Miloš Buděšínský and Karel Jošt
    Synthesis and properties of oxytocin analogues modified in the tripeptide side chain
    1984, Vol. 49, Issue 3, pp. 642–652 [Abstract]
  • Helena Velgová
    4,4-Dimethyl-A-homoandrostane epoxides
    1984, Vol. 49, Issue 1, pp. 150–156 [Abstract]
  • Josef Pola, Pavel Kubát, Josef Vítek, Marta Farkačová and Antonín Trka
    cw CO2 laser photosensitized decomposition of n-heptane
    1983, Vol. 48, Issue 12, pp. 3527–3531 [Abstract]
  • Mirko Černý and Antonín Trka
    Formation of sulphur compounds in the hydrodenitrogenation of 2-methylquinoline, 2-methylpiperidine, indole, and isoquinoline on a nickel-tungsten catalyst in the presence of hydrogen sulphide
    1983, Vol. 48, Issue 12, pp. 3413–3420 [Abstract]
  • Helena Velgová
    4,4-Dimethyl-A-homoandrostane epoxides
    1983, Vol. 48, Issue 9, pp. 2536–2548 [Abstract]
  • Helena Velgová
    Stereochemistry of epoxidation and hydroboration of some 4,4-dimethyl-A-homo-5-cholestene derivatives
    1983, Vol. 48, Issue 6, pp. 1774–1782 [Abstract]
  • Mirko Černý and Antonín Trka
    Formation of sulphur compounds in hydrodenitrogenation of quinoline, 1,2,3,4-tetrahydroquinoline, pyridine, piperidine and 1-pent-4-enylamine on a nickel-tungsten catalyst in the presence of hydrogen sulphide
    1983, Vol. 48, Issue 6, pp. 1749–1758 [Abstract]
  • Helena Velgová and Antonín Trka
    Hydrogenolytic opening of 4,4-dimethyl-4a,5-epoxy-a-homocholestane derivatives and mass spectra of some reaction products
    1983, Vol. 48, Issue 3, pp. 937–955 [Abstract]
  • Ladislav Kohout, Alexander Kasal, Vlastimil Šanda and Helena Velgová
    Rearrangement of the 16,17-cyclopropano derivatives
    1983, Vol. 48, Issue 1, pp. 173–183 [Abstract]
  • Antonín Trka and Helena Velgová
    Mass spectra of 4,4-dimethyl-A-homocholestane-3,5- and 3,4a diols and their derivatives
    1982, Vol. 47, Issue 12, pp. 3328–3338 [Abstract]
  • Antonín Trka and Alexander Kasal
    Inductive effect in EI-mass spectra of some 5,6-dihalogenides and 5,6-halohydrins of 5α-cholestan-3β-ol and 3β-acetoxy-5α-cholestane
    1982, Vol. 47, Issue 11, pp. 2946–2960 [Abstract]
  • Antonín Vítek and Josef Krupička
    Distinguishing some types of one-electron reversible processes according to different polarographic wave forms
    1982, Vol. 47, Issue 11, pp. 2838–2848 [Abstract]
  • Antonín Trka and Helena Velgová
    Mass spectra of 4,4-dimethyl-A-homo-4a,6-cholestadien-3-ols, 4,4-dimethyl-A-homo-5-cholestene-3,4a-diols and their derivatives
    1982, Vol. 47, Issue 10, pp. 2768–2778 [Abstract]
  • Helena Velgová
    Acid catalysed opening of 4,4-dimethyl-4a,5-epoxy-A-homocholestane derivatives
    1982, Vol. 47, Issue 9, pp. 2530–2539 [Abstract]
  • Zdenko Procházka, Miloš Buděšínský, Jorga Smolíková, Petr Trška and Karel Jošt
    1-Aminocyclopropanecarboxylic acid and its derivatives
    1982, Vol. 47, Issue 8, pp. 2291–2305 [Abstract]
  • Helena Velgová and Antonín Trka
    Reaction of lithium aluminium hydride with 4,4-dimethyl-4a,5-epoxy-A-homocholestane derivatives and mass spectral fragmentation of some degradation products
    1982, Vol. 47, Issue 7, pp. 2007–2023 [Abstract]
  • Juraj Harmatha, Miloš Buděšínský and Antonín Trka
    The structure of yatein. Determination of the positions, and configurations of benzyl groups in lignans of the 2,3-dibenzylbutyrolactone type
    1982, Vol. 47, Issue 2, pp. 644–663 [Abstract]
  • Helena Velgová and Antonín Trka
    Epoxidation of 4,4-dimethyl-A-homo-4a-cholestene derivatives and a study of electron impact mass spectra of the epoxidation products
    1982, Vol. 47, Issue 1, pp. 315–337 [Abstract]
  • Jiří Závada, Magdalena Pánková and Antonín Vítek
    The search for the active base operating in alkoxide promoted E2 reactions in low polar solvents: A kinetic analysis of the elusive problem
    1981, Vol. 46, Issue 13, pp. 3247–3263 [Abstract]
  • Zdenko Procházka, Jorga Smolíková, Petr Maloň and Karel Jošt
    Synthetic utilization of α-amino-γ-bromobutyric acid in the preparation of non-coded amino acids; IR study of homoserine
    1981, Vol. 46, Issue 11, pp. 2935–2946 [Abstract]
  • Jorga Smolíková, Jan Pospíšek and Karel Bláha
    Infrared spectra of N-acetyl-L-α-amino-acid N'-methylamides with aliphatic side chains in non-polar solvents
    1981, Vol. 46, Issue 3, pp. 772–780 [Abstract]
  • Helena Velgová and Jorga Smolíková
    4,4-Dimethyl-A-homocholestane derivatives
    1981, Vol. 46, Issue 3, pp. 607–625 [Abstract]
  • Alexander Kasal and Antonín Trka
    Splitting off of water from the molecular ions of steroidal cyclopropyl ketones
    1980, Vol. 45, Issue 11, pp. 2985–2997 [Abstract]
  • Antonín Trka and Alexander Kasal
    Electron impact mass spectra of some vicinal trans-dihalo- and trans-hydroxyhalocholestanes
    1980, Vol. 45, Issue 6, pp. 1720–1733 [Abstract]
  • Roman Řeřicha, Antonín Vítek, Dana Kolihová, Václav Sychra, Zdeněk Šír and Jiří Hetflejš
    Asymmetric distribution of a metal in a heterogenized homogeneous catalyst
    1979, Vol. 44, Issue 11, pp. 3183–3193 [Abstract]
  • Otto Exner, Jorga Smolíková, Václav Jehlička and Ahmad S. Shawali
    Hydrogen bonding, configuration and conformation of substituted α-oxo oximes and hydrazones
    1979, Vol. 44, Issue 8, pp. 2494–2506 [Abstract]
  • Helena Velgová, Miroslava Synáčková and Václav Černý
    Preparation of some 3α,5-cycloandrostane derivatives with expanded ring B
    1979, Vol. 44, Issue 1, pp. 260–268 [Abstract]
  • Helena Velgová, Dietrich Zeigan, Günther Engelhardt and Antonín Trka
    Cyclization of 17-ethylenedioxy-3α,5-cyclo-6,7-seco-5α-androstane-6,7-diol
    1979, Vol. 44, Issue 1, pp. 128–144 [Abstract]
  • Jorga Smolíková and Karel Bláha
    Infrared spectroscopy of six-membered lactams substituted with the tert-butyl group
    1978, Vol. 43, Issue 10, pp. 2800–2811 [Abstract]
  • Božo Plesničar, Jorga Smolíková, Václav Jehlička and Otto Exner
    Dipole moment of the intramolecular hydrogen bond. Substituted α-hydroxyacetophenones
    1978, Vol. 43, Issue 10, pp. 2754–2762 [Abstract]