Collect. Czech. Chem. Commun. 1978, 43, 638-646
https://doi.org/10.1135/cccc19780638

Fission of the epimeric 2,3-epoxides in the 5,7β-cyclo-B-homo-5β-cholestane series

Ladislav Kohout and Jan Fajkoš

Individual author index pages


Other CCCC articles of these authors

  • Miloš Buděšínský, Jan Fajkoš, Jaroslav Günter and Alexander Kasal*
    Synthesis, Reactions, Conformation Analysis, and NMR Spectra of 5,10-Epoxy-5ξ,10ξ-estrane-3,17-diones
    2005, Vol. 70, Issue 4, pp. 507–518 [Abstract]
  • František Franěk*, Tomáš Eckschlager and Ladislav Kohout
    24-Epibrassinolide at Subnanomolar Concentrations Modulates Growth and Production Characteristics of a Mouse Hybridoma
    2003, Vol. 68, Issue 11, pp. 2190–2200 [Abstract]
  • Miroslav Šíša, Miloš Buděšínský and Ladislav Kohout*
    Synthesis and Biological Activity of 7a-Homo- and 7a,7b-Dihomo-5α-cholestane Analogues of Brassinolide
    2003, Vol. 68, Issue 11, pp. 2171–2189 [Abstract]
  • Hana Chodounská, Miloš Buděšínský, Romana Šídová, Miroslav Šíša, Alexander Kasal and Ladislav Kohout*
    Simple NMR Determination of 5α/5β Configuration of 3-Oxosteroids
    2001, Vol. 66, Issue 10, pp. 1529–1544 [Abstract]
  • Ladislav Kohout*, Hana Chodounská, Tomáš Macek and Miroslav Strnad
    Synthesis of (20S)-2α,3α-Dihydroxy-6-oxo-7-oxa-7a-homo-5α-pregnane-20-carboxylic Acid as a Brassinosteroid Part of Ligands for Binding to Affinity Chromatography Carriers
    2000, Vol. 65, Issue 11, pp. 1754–1761 [Abstract]
  • Jaroslava Hniličková* and Ladislav Kohout
    Synthesis of 21-Hydroxy-6β,19-epoxypregn-4-ene-3,20-dione
    2000, Vol. 65, Issue 3, pp. 380–384 [Abstract]
  • Carme Brosa, Ismael Zamora, Emma Terricabras and Ladislav Kohout
    The Effect of Electrostatic Properties and Abibility to Form Hydrogen-Bonds on the Activity of Brassinosteroid Side-Chain Analogs
    1998, Vol. 63, Issue 10, pp. 1635–1645 [Abstract]
  • Romana Šídová, Karel Stránský, Alexander Kasal, Barbora Slavíková and Ladislav Kohout
    Long-Range Effect of 17-Substituents in 3-Oxo Steroids on 4,5-Double Bond Hydrogenation
    1998, Vol. 63, Issue 10, pp. 1528–1542 [Abstract]
  • Barbora Slavíková, Alexander Kasal and Ladislav Kohout
    N-Benzoyl-N-methylandrostan-17β-amines; 20-Aza Analogues of Brassinolide
    1998, Vol. 63, Issue 5, pp. 655–661 [Abstract]
  • Ladislav Kohout, Barbora Slavíková and Miroslav Strnad
    17a-Oxa-17a-homobrassinosteroid Analogues
    1998, Vol. 63, Issue 5, pp. 646–654 [Abstract]
  • Lucie Dalibová and Ladislav Kohout
    Preparation of Steroid Olefins from Heptafluorobutyrates
    1998, Vol. 63, Issue 4, pp. 549–556 [Abstract]
  • Alexander Kasal, Barbora Slavíková, Ladislav Kohout and Miloš Buděšínský
    The Synthesis of A-Homo-B-norandrostanes: The Effect of a Hydroxyl on the Course of Hydrogenation of the ∆9-Double Bond
    1997, Vol. 62, Issue 10, pp. 1631–1641 [Abstract]
  • Jan Fajkoš, Vladimír Pouzar and Ivan Černý
    Synthesis of (15E)-3β-Hydroxyandrost-5-ene-15,17-dione 15-(O-Carboxymethyl)oxime; The New Hapten for 3β-Hydroxyandrost-5-en-17-one (Dehydroepiandrosterone, DHEA)
    1996, Vol. 61, Issue 11, pp. 1647–1654 [Abstract]
  • Ladislav Kohout, Alexander Kasal and Miroslav Strnad
    Pregnane-Type Brassinosteroids with a Four-Carbon Ester Functionality in Position 20
    1996, Vol. 61, Issue 6, pp. 930–940 [Abstract]
  • Alexander Kasal, Ladislav Kohout and Michal Lebl
    Synthesis of a Scaffold for the Creation of Non-Peptide Libraries
    1995, Vol. 60, Issue 12, pp. 2147–2155 [Abstract]
  • Ladislav Kohout
    7-Oxo-7a-oxa-brassinosteroids with Cholestane Side-Chain
    1994, Vol. 59, Issue 5, pp. 1219–1225 [Abstract]
  • Ladislav Kohout and Alexander Kasal
    7a-Keto-B-homotestosterone and 7a-Keto-B-homoepitestosterone
    1994, Vol. 59, Issue 3, pp. 649–657 [Abstract]
  • Ladislav Kohout
    New Method of Preparation of Brassinosteroids
    1994, Vol. 59, Issue 2, pp. 457–460 [Abstract]
  • Alexander Kasal, Richard Hampl, Zdeněk Putz, Ladislav Kohout and Luboslav Stárka
    Preparation and Properties of Three Immunogens with a Spacer on the β-Side of the Steroid Skeleton and the Effect of Immunogen Structure on Specificity of the Obtained Antisera
    1992, Vol. 57, Issue 10, pp. 2166–2173 [Abstract]
  • Ladislav Kohout and Miroslav Strnad
    Brassinosteroids with Ester Function with Five Carbon Atoms at the 20 Position
    1992, Vol. 57, Issue 8, pp. 1731–1738 [Abstract]
  • Jan Fajkoš and Vladimír Pouzar
    Synthesis of (19E)-17β-hydroxy-3-oxo-5α-androstan-19-al 19-(O-carboxymethyl)oxime
    1991, Vol. 56, Issue 12, pp. 2884–2891 [Abstract]
  • Jan Fajkoš, Vladimír Pouzar and Karel Vereš
    Synthesis of (19E)-3,20-dioxopregn-4-en-19-al 19-(O-carboxymethyl)oxime
    1991, Vol. 56, Issue 5, pp. 1087–1092 [Abstract]
  • Jan Fajkoš, Vladimír Pouzar and Karel Vereš
    Synthesis of (19E)-17β-hydroxy-3-oxoandrost-4-en-19-al 19-(O-carboxymethyl)oxime
    1990, Vol. 55, Issue 8, pp. 2086–2094 [Abstract]
  • Ladislav Kohout
    Syntheis of brassino steroids with a five carbon atom ester functionality in position 17
    1989, Vol. 54, Issue 12, pp. 3348–3359 [Abstract]
  • Ladislav Kohout
    7-Methanesulfonyloxy-3α,5-cyclo-5α-cholestanes
    1989, Vol. 54, Issue 4, pp. 1028–1035 [Abstract]
  • Ladislav Kohout and Miroslav Strnad
    Brassinolide analogues without side chain
    1989, Vol. 54, Issue 4, pp. 1019–1027 [Abstract]
  • Jan Fajkoš and Jiří Joska
    Solvolytic rearrangements in 4β,5-cyclopropano-5β-androstane-3β,17β,19-triol 3-acetate 17-benzoate 19-p-toluenesulfonate
    1989, Vol. 54, Issue 3, pp. 751–759 [Abstract]
  • Jiří Joska, Jan Fajkoš and František Tureček
    Solvolytic rearrangements in 4β,5-cyclopropano-5β-cholestane-3β,19-diol 3-acetate 19-p-toluenesulphonate
    1987, Vol. 52, Issue 12, pp. 2991–3012 [Abstract]
  • Ladislav Kohout, Václav Černý and Miroslav Strnad
    Alternative syntheses of 2α,3α,17β-trihydroxy-7-oxa-B-homo-5α-androstan-6-one and some androstane brassinolide analogs
    1987, Vol. 52, Issue 4, pp. 1026–1042 [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]
  • Ladislav Kohout
    Solvolytic reactions of epimeric 3-methanesulfonyloxy-7-benzoyloxy-5α,6α-cyclopropanocholestanes
    1986, Vol. 51, Issue 10, pp. 2222–2231 [Abstract]
  • Ladislav Kohout and Miroslav Strnad
    Brassinosteroids with a cholestane side chain
    1986, Vol. 51, Issue 2, pp. 447–458 [Abstract]
  • Ladislav Kohout, Vijay Kumar Sethi, Jaroslav Zajíček and Alexander Kasal
    Solvolytic reactions of empiric 3-methanesulfonyloxy-7-benzoyloxy-5β,6β-cyclopropanocholestanes
    1986, Vol. 51, Issue 2, pp. 436–446 [Abstract]
  • Ladislav Kohout
    The synthesis of 5,6-cyclopropanocholestanes with oxygen functions in positions 3 and 7
    1986, Vol. 51, Issue 2, pp. 429–435 [Abstract]
  • Jiří Joska, Jan Fajkoš and Jaroslav Zajíček
    Synthesis of 3β,4β-cyclopropano-19-nor-A-homosteroids
    1985, Vol. 50, Issue 7, pp. 1611–1617 [Abstract]
  • Alexander Kasal, Ladislav Kohout and Jiří Filip
    4,5-Secoandrostanes by Eschenmoser's reaction
    1985, Vol. 50, Issue 6, pp. 1402–1414 [Abstract]
  • Jan Fajkoš and Jiří Joska
    Synthesis of 19-nordeoxycorticosterone 3-(O-carboxymethyl)-oxime
    1985, Vol. 50, Issue 4, pp. 973–977 [Abstract]
  • Helena Velgová and Ladislav Kohout
    6,7-Secoandrostane derivatives
    1985, Vol. 50, Issue 4, pp. 962–972 [Abstract]
  • Ladislav Kohout and Jaroslav Zajíček
    Lead tetraacetate oxidation of 3β-acetoxy-B-homo-5α-cholestan-7aβ-ol
    1984, Vol. 49, Issue 1, pp. 301–305 [Abstract]
  • Jiří Joska, Jan Fajkoš and Jaroslav Zajíček
    Bromination of 19-acetoxy-4β,5-cyclopropano-5β-cholestan-3-one
    1983, Vol. 48, Issue 12, pp. 3474–3481 [Abstract]
  • Jan Fajkoš, Jiří Joska and Jaroslav Zajíček
    The bromination of the epimeric 4,5-cyclopropanocholestan-3-ones
    1983, Vol. 48, Issue 12, pp. 3455–3473 [Abstract]
  • Ladislav Kohout and Alexander Kasal
    Electrophilic addition to the 5,6-double bond in A-nor-3,5-secosteroids
    1983, Vol. 48, Issue 7, pp. 2051–2063 [Abstract]
  • Alexander Kasal, Luboš Stárka, Richard Hampl and Ladislav Kohout
    Preparation and pharmacological properties of 4,5-secopregnane-3,20-dione and its derivatives
    1983, Vol. 48, Issue 7, pp. 2040–2050 [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]
  • Jiří Joska and Jan Fajkoš
    Synthesis of 19-hydroxylated analogues of androstenedione and testosterone with the cyclopropane ring in 4,5-position
    1982, Vol. 47, Issue 9, pp. 2423–2432 [Abstract]
  • Ladislav Kohout, Vlastimil Šanda and Jan Fajkoš
    Synthesis of two isomeric 16,17-cyclopropano derivatives of 5-pregnene
    1982, Vol. 47, Issue 5, pp. 1503–1513 [Abstract]
  • Jan Fajkoš and Jiří Joska
    The solvolyses of 3α and 3β-p-toluenesulphonates of 19-acetoxy-5,6β-cyclopropano-5β-cholestane-3,19-diols
    1982, Vol. 47, Issue 1, pp. 144–155 [Abstract]
  • Alexander Kasal and Ladislav Kohout
    4,5-Secoanalogues of dihydrotestosterone with a cyclopropane ring in the position 5(6)
    1982, Vol. 47, Issue 1, pp. 130–143 [Abstract]
  • Jiří Joska and Jan Fajkoš
    Synthesis of some 19-hydroxylated androgen analogues with the cyclopropane ring in 4,5-position
    1981, Vol. 46, Issue 11, pp. 2751–2757 [Abstract]
  • Ladislav Kohout
    Synthesis of 5,6-cyclopropanocholestane derivatives with an oxygen function in position 7
    1981, Vol. 46, Issue 8, pp. 1828–1838 [Abstract]
  • František Tureček and Ladislav Kohout
    The stereospecific loss of water from B-homocholestanols under electron impact
    1980, Vol. 45, Issue 9, pp. 2433–2442 [Abstract]
  • Ladislav Kohout and Jan Fajkoš
    Analogues of androgens with a cyclopropane ring in 6α,7α-position
    1980, Vol. 45, Issue 7, pp. 1974–1981 [Abstract]
  • Jiří Joska and Jan Fajkoš
    Simmons-Smith methylenation of the 4,5-double bond in 19-hydroxylated steroids
    1980, Vol. 45, Issue 6, pp. 1850–1859 [Abstract]
  • Jan Fajkoš and Jiří Joska
    Synthesis of 11-hydroxylated androstane derivatives
    1980, Vol. 45, Issue 6, pp. 1845–1849 [Abstract]
  • Jan Fajkoš, Jiří Joska and František Tureček
    Solvolysis of 5,6β-cyclopropano-5β-cholestane-3β,19-diol 3-acetate 19-p-toluenesulphonate
    1980, Vol. 45, Issue 2, pp. 584–598 [Abstract]
  • Pavel Kočovský, Ladislav Kohout and Václav Černý
    Participation of 19-substituents in electrophilic additions to 6,7-unsaturated 5α-cholestane and B-homo 5α-cholestane derivatives; A case of competition between the participation of an ambident neighboring group and external nucleophile attack
    1980, Vol. 45, Issue 2, pp. 559–583 [Abstract]
  • Vlastimil Šanda, Ladislav Kohout and Jan Fajkoš
    5,7-Cyclo-B-homopregnane derivatives with the corticoid ketol side chain
    1980, Vol. 45, Issue 1, pp. 269–273 [Abstract]
  • Ladislav Kohout and Jan Fajkoš
    Acetolysis of 4β-methanesulphonyloxy-6β,7aβ-cyclo-B-homo-5α-cholestane
    1979, Vol. 44, Issue 11, pp. 3308–3320 [Abstract]
  • Jan Fajkoš and Jiří Joska
    Simmons-Smith methylenation of the 5,6-double bond in 19-hydroxylated steroids
    1979, Vol. 44, Issue 1, pp. 251–259 [Abstract]
  • Jiří Joska and Jan Fajkoš
    19-Hydroxysteroids substituted in position 6
    1978, Vol. 43, Issue 12, pp. 3433–3443 [Abstract]
  • Bruno Schönecker, Dieter Tresselt, Gerd Schubert, Ladislav Kohout and Jan Fajkoš
    1H-NMR investigations. Application of trichloroacetyl isocyanate to structure determination of 3-, 6-, 7-, 7a- and 17-hydroxy steroids
    1978, Vol. 43, Issue 10, pp. 2609–2618 [Abstract]
  • Jan Fajkoš and Jiří Joska
    19-Norsteroids substituted in position 7
    1978, Vol. 43, Issue 4, pp. 1142–1151 [Abstract]
  • Ladislav Kohout and Jan Fajkoš
    Methylenation of 4,6-cholestadien-3-one
    1978, Vol. 43, Issue 4, pp. 1134–1141 [Abstract]
  • Ladislav Kohout
    2,3-Disubstituted derivatives of the 6β,7aβ-cyclo-B-homo-5α-cholestane series
    1978, Vol. 43, Issue 3, pp. 889–899 [Abstract]