Collect. Czech. Chem. Commun. 1982, 47, 2768-2778
https://doi.org/10.1135/cccc19822768

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

Antonín Trka and Helena Velgová

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

Individual author index pages


Other CCCC articles of these authors

  • 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]
  • 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]
  • 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]
  • 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]
  • Helena Velgová
    Acid catalysed opening of 4,4-dimethyl-4a,5-epoxy-A-homocholestane derivatives
    1982, Vol. 47, Issue 9, pp. 2530–2539 [Abstract]
  • Helena Velgová, Jorga Smolíková, Antonín Trka and Antonín Vítek
    Cyclopropyl→cyclobutyl rearrangement in intramolecular cyclization of 3,5-bridged B-secoandrostane-6,7(or 5,7)-diols and mass spectra of products
    1982, Vol. 47, Issue 8, pp. 2280–2290 [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]
  • 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]
  • 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]