Collect. Czech. Chem. Commun. 1975, 40, 1758-1767
https://doi.org/10.1135/cccc19751758

Conformation of ring A of 2,3-disubstituted triterpenes with chlorine or alkoxy group in the position 2

J. Klinot, V. Richtr and A. Vystrčil

Individual author index pages


Other CCCC articles of these authors

  • F. Tureček and A. Vystrčil
    The synthesis of (3-2H)tricyclo[6,2,2,O2,7]-3,9-dodecadiene
    1977, Vol. 42, Issue 8, pp. 2408–2414 [Abstract]
  • V. Pouzar and A. Vystrčil
    Preparation of derivatives of 29-hydroxy-30-norlupan-20-one
    1977, Vol. 42, Issue 7, pp. 2224–2230 [Abstract]
  • J. Protiva, M. Buděšínský and A. Vystrčil
    Unusual course of photolysis of 3β-acetoxy-28-nitrosyloxylupane. Synthesis of triterpenic N-oxides and hydroxamic acids
    1977, Vol. 42, Issue 4, pp. 1220–1228 [Abstract]
  • J. Protiva, F. Tureček and A. Vystrčil
    Revised structure of thurberine. Synthesis of 3,12-lupanedione
    1977, Vol. 42, Issue 1, pp. 140–150 [Abstract]
  • V. Pouzar and A. Vystrčil
    Reduction and steric interaction of 12-lupanone derivatives
    1976, Vol. 41, Issue 11, pp. 3452–3466 [Abstract]
  • J. Protiva, V. Pouzar and A. Vystrčil
    Mass spectra of 12-oxolupane derivatives
    1976, Vol. 41, Issue 8, pp. 2225–2237 [Abstract]
  • J. Vokoun, E. Klinotová and A. Vystrčil
    Mass spectrometric fragmentation of triterpenoid derivatives with oxabicyclooctane and oxabicycloheptane ring E arrangement
    1976, Vol. 41, Issue 5, pp. 1590–1597 [Abstract]
  • F. Tureček and A. Vystrčil
    The syntheses of 7-alkyl derivatives of bicyclo[4,3,0]-3-nonenes
    1976, Vol. 41, Issue 5, pp. 1581–1589 [Abstract]
  • F. Tureček and A. Vystrčil
    The syntheses of 8-alkyl derivatives of bicyclo[4,3,0]-3-nonenes
    1976, Vol. 41, Issue 5, pp. 1571–1580 [Abstract]
  • J. Protiva and A. Vystrčil
    Reaction of amides of 28-lupanoic acid with lead tetraacetate and iodine mass spectra of 12-lupene derivatives
    1976, Vol. 41, Issue 4, pp. 1200–1207 [Abstract]
  • M. R. Nair, S. Hilgard, J. Klinot, K. Waisser and A. Vystrčil
    Oxidation rates of triterpenoid secondary alcohols with chromic acid
    1976, Vol. 41, Issue 3, pp. 770–779 [Abstract]
  • E. Klinotová, J. Beneš, J. Vokoun and A. Vystrčil
    Oxidation of 21-oxo-20β,28-epoxy-18α,19βH-ursane derivatives; Unusual reactivity of oxabicyclo[2,2,1]heptane system in ring E
    1976, Vol. 41, Issue 1, pp. 271–284 [Abstract]
  • J. Klinot, M. Hořejší, M. Buděšínský and A. Vystrčil
    Conformation of the ring A in 2,3-disubstituted 24-nortriterpenes and the stereochemistry of the opening of 2β,3β-epoxides
    1975, Vol. 40, Issue 12, pp. 3712–3727 [Abstract]
  • V. Pouzar, J. Protiva, E. Lisá, E. Klinotová and A. Vystrčil
    Reaction of 20-lupanol derivatives with lead tetraacetate
    1975, Vol. 40, Issue 10, pp. 3046–3054 [Abstract]
  • E. Klinotová, J. Beneš and A. Vystrčil
    Oxidative cleavage of 22-hydroxymethylene-21-ketones of the 20,28β-epoxy-18α,19βΗ-ursane series
    1975, Vol. 40, Issue 9, pp. 2861–2868 [Abstract]
  • A. Vystrčil, V. Křeček and M. Buděšínský
    Photooxidation of (20R)- and (20S)-29-lupanol derivatives
    1975, Vol. 40, Issue 5, pp. 1593–1603 [Abstract]
  • J. Klinot, M. Buděšínský, M. Kliment, S. Hilgard and A. Vystrčil
    Conformation of ring A of 1,2-disubstituted triterpenes. Geometry and stability of the boat form
    1975, Vol. 40, Issue 5, pp. 1426–1440 [Abstract]
  • K. Waisser, J. Urban and A. Vystrčil
    Synthesis of anagadiol
    1975, Vol. 40, Issue 2, pp. 452–456 [Abstract]
  • J. Klinot, M. Buděšínský, S. Hilgard and A. Vystrčil
    The effect of 8β-methyl group on the conformation of the ring of a 2,3-disubstituted triterpenes
    1974, Vol. 39, Issue 12, pp. 3741–3755 [Abstract]
  • J. Klinot, M. Kliment and A. Vystrčil
    Preparation and stereochemistry of 1,2- and 2,3-bromohydrins, bromo ketones, epoxides and diols of triterpenes
    1974, Vol. 39, Issue 11, pp. 3357–3373 [Abstract]
  • A. Vystrčil and V. Pouzar
    Functionalization of the lupane skeleton through Barton's reaction
    1974, Vol. 39, Issue 11, pp. 3304–3316 [Abstract]
  • S. Hilgard, M. Horák and A. Vystrčil
    Formation and stabilization energy of very weak collision complexes of alcohols and carboxylic acid monomers with non-polar solvents
    1974, Vol. 39, Issue 11, pp. 3215–3223 [Abstract]
  • A. Vystrčil, V. Křeček and M. Buděšínský
    Elimination reaction of the angular hydroxymethyl group of the lupane skeleton
    1974, Vol. 39, Issue 11, pp. 3131–3143 [Abstract]
  • A. Vystrčil and V. Pouzar
    Functionalisation of the lupane skeleton using Barton's reaction
    1974, Vol. 39, Issue 10, pp. 2961–2974 [Abstract]
  • A. Vystrčil, V. Křeček and M. Buděšínský
    Elimination reactions on angular hydroxymethyl group of the lupane skeleton
    1974, Vol. 39, Issue 9, pp. 2494–2506 [Abstract]
  • A. Vystrčil and J. Protiva
    Photo-oxidation of 28-lupanol and its derivatives
    1974, Vol. 39, Issue 5, pp. 1382–1390 [Abstract]
  • A. Vystrčil, V. Pouzar and V. Křeček
    Triterpenes. XXXII. Absolute configuration at C(20) in 29-substituted lupane derivatives
    1973, Vol. 38, Issue 12, pp. 3902–3911 [Abstract]
  • A. Vystrčil and Z. Blecha
    Triterpenes. XXXI. Absolute configuration at C(20) in 30-nor-20ξ-lupanol derivatives
    1973, Vol. 38, Issue 12, pp. 3648–3661 [Abstract]
  • K. Waisser, S. Hilgard, A. Zelenka and A. Vystrčil
    Triterpenes. XXX. Study for the synthesis of glochidiol
    1973, Vol. 38, Issue 11, pp. 3521–3531 [Abstract]
  • J. Klinot, E. Úlehlová, R. Straka and A. Vystrčil
    Triterpenes. XXIX. 3,4-Seco acids of 18α-oleanane series with modified side chain at C(5)
    1973, Vol. 38, Issue 9, pp. 2648–2657 [Abstract]
  • E. Klinotová, N. Hovorková, J. Klinot and A. Vystrčil
    Triterpenes. XXVIII. Stereochemistry of dehydration of isomeric 20-hydroxy-30-norderivatives of lupane
    1973, Vol. 38, Issue 4, pp. 1179–1189 [Abstract]
  • M. Horák and A. Vystrčil
    The low-temperature infrared spectrum of the s-trans form of benzalacetone
    1973, Vol. 38, Issue 4, pp. 1156–1158 [Abstract]
  • K. Waisser, M. Buděšínský, A. Vítek and A. Vystrčil
    Triterpenes. XXVII. Conformational analysis of the A-cycle of 1,3-dihydroxy derivatives of pentacyclic triterpenoids
    1972, Vol. 37, Issue 11, pp. 3652–3659 [Abstract]
  • E. Klinotová and A. Vystrčil
    Triterpenes. XXVI. Participation of oxygen-containing groups in position 28 in the addition of bromine to the double bond of 20(21)-taraxastene derivatives
    1972, Vol. 37, Issue 6, pp. 1883–1893 [Abstract]
  • E. Klinotová, I. Škarková and A. Vystrčil
    Triterpenes. XXV. Isomerisation of 20α,21α-epoxy-28-benzoyloxy derivatives of taraxastane
    1972, Vol. 37, Issue 5, pp. 1748–1754 [Abstract]
  • J. Klinot, M. Buděšínský and A. Vystrčil
    Triterpenes. XXIV. Migration of the side chain during the acid catalysed isomerisation of unsaturated 3,4-seco derivatives
    1972, Vol. 37, Issue 4, pp. 1356–1370 [Abstract]
  • A. Vystrčil and Z. Blecha
    Triterpenes. XXIII. Dehydrogenation of derivatives of 20(29)-lupene with mercuric acetate III. Dehydrobetulinic acid
    1972, Vol. 37, Issue 2, pp. 624–636 [Abstract]
  • A. Vystrčil and Z. Blecha
    Triterpenes. XXII. Dehydrogenation of derivatives of 20(29)-lupene with mercuric acetate II. Degradation of the side chain
    1972, Vol. 37, Issue 2, pp. 610–623 [Abstract]
  • J. Klinot, V. Šumanová and A. Vystrčil
    Triterpenes. XXI. 3,4-Seco derivatives of betulinic acid
    1972, Vol. 37, Issue 2, pp. 603–609 [Abstract]
  • J. Klinot, K. Waisser, L. Streinz and A. Vystrčil
    Triterpenes. XX. The participation of dimethylformamide in the addition of halogens to the Δ2-double bond - A way to the preparation of β-epoxides
    1970, Vol. 35, Issue 12, pp. 3610–3617 [Abstract]
  • A. Vystrčil and Z. Blecha
    Triterpenes. XIX. Dehydrogenation of 20(29)-lupene derivatives with mercuric acetate
    1970, Vol. 35, Issue 11, pp. 3309–3319 [Abstract]
  • J. Klinot, N. Hovorková and A. Vystrčil
    Triterpenes. XVIII. Oxidation of the isopropenyl group with peracids
    1970, Vol. 35, Issue 4, pp. 1105–1119 [Abstract]
  • A. Vystrčil and M. Buděšínský
    Triterpenes. XVII. Preparation of new 19αH-lupane derivatives
    1970, Vol. 35, Issue 1, pp. 312–320 [Abstract]
  • A. Vystrčil and M. Buděšínský
    Triterpenes. XVI. Unusual epimerisation of the C(19)-acetyl group of 20-oxo-30-norlupane derivatives
    1970, Vol. 35, Issue 1, pp. 295–311 [Abstract]
  • E. Říhová and A. Vystrčil
    Triterpenes. XV. A 2nd order Beckmann rearrangement of 20β,28-epoxytaraxastane 21- and 22-oximino derivatives
    1969, Vol. 34, Issue 1, pp. 240–246 [Abstract]
  • K. Waisser, J. Zelinka and A. Vystrčil
    Triterpenes. XIV. The stereochemistry of 1-hydroxytriterpenes
    1968, Vol. 33, Issue 8, pp. 2485–2493 [Abstract]
  • J. Klinot, E. Úlehlová and A. Vystrčil
    Triterpenes. XIII. Performic acid oxidation of isopropenyl group in 3,4-secotriterpenes
    1967, Vol. 32, Issue 8, pp. 2890–2897 [Abstract]
  • J. Klinot, E. Říhová and A. Vystrčil
    Triterpenes. XII. Preparation of 18α,19βH-ursan-28,20β-olide (taraxastanolide)
    1967, Vol. 32, Issue 3, pp. 1276–1279 [Abstract]
  • K. Waisser, A. Vystrčil and A. Vítek
    Triterpenes. XI. Infra-red absorption of triterpenic 1-hydroxy derivatives
    1966, Vol. 31, Issue 12, pp. 4741–4743 [Abstract]
  • K. Waisser and A. Vystrčil
    Triterpenes. X. Preparation of 1-hydroxy-19β,28-epoxy-18αH-olean-2-enes
    1966, Vol. 31, Issue 8, pp. 3182–3188 [Abstract]
  • J. Kinot, M. Krumpolc and A. Vystrčil
    Triterpenes. IX. Reaction of isomeric 2,3-epoxides with Grignard reagent
    1966, Vol. 31, Issue 8, pp. 3174–3181 [Abstract]
  • E. Říhová and A. Vystrčil
    Triterpenes. VIII. Intramolecular epoxidation in ring E; Hydroxy derivatives of 20β,28- and 21β,28-epoxytaraxastane
    1966, Vol. 31, Issue 8, pp. 3163–3173 [Abstract]
  • J. Klinot and A. Vystrčil
    Triterpenes. VII. Stereochemistry of 2-bromo derivatives of allobetuline and alloheterobetuline
    1966, Vol. 31, Issue 3, pp. 1079–1092 [Abstract]
  • J. Křepinský, V. Herout, F. Šorm, A. Vystrčil, R. Prokeš and G. Jommi
    Plant substances. XXIII. The structure of sarcodontic acid
    1965, Vol. 30, Issue 8, pp. 2626–2630 [Abstract]
  • A. Vystrčil and E. Říhová
    Über Triterpene VI. Intramolekulare Epoxydierung im Triterpenring E; Darstellung von 21β,28-Oxido-taraxastan-Derivaten
    1964, Vol. 29, Issue 10, pp. 2377–2388 [Abstract]
  • J. Klinot and A. Vystrčil
    Nebenprodukte bei der Umsetzung von Allobetulin zu Heterobetulin
    1964, Vol. 29, Issue 2, pp. 516–530 [Abstract]
  • R. Zahradník and A. Vystrčil
    Study of aurones. III. Attempt for theoretical explanation of formation of benzofuran derivative from aurone
    1963, Vol. 28, Issue 5, pp. 1334–1338 [Abstract]
  • A. Holý and A. Vystrčil
    Studie der Aurone II. Über die Reaktivität der Carbonylgruppe in Auronen
    1962, Vol. 27, Issue 8, pp. 1861–1869 [Abstract]
  • J. Klinot and A. Vystrčil
    Beckmannsche Umlagerung von Triterpen-3-ketoximen
    1962, Vol. 27, Issue 2, pp. 377–386 [Abstract]
  • A. Vystrčil, E. Stejskalová-Vondrášková and J. Černý
    Über die Identität von Graciolon und Betulinsäure
    1959, Vol. 24, Issue 10, pp. 3279–3286 [Abstract]
  • A. Vystrčil and J. Klinot
    Struktur des alloHeterobetulins
    1959, Vol. 24, Issue 10, pp. 3273–3278 [Abstract]
  • A. Vystrčil and J. Černý
    Modellverbindungen des Physostigmins
    1959, Vol. 24, Issue 3, pp. 804–808 [Abstract]
  • L. Stárka and A. Vystrčil
    Polarographie der anthronderivate in eisessig
    1958, Vol. 23, Issue 2, pp. 216–220 [Abstract]
  • L. Stárka, A. Vystrčil and B. Stárková
    Polarographie der Anthrachinonderivate in Eisessig
    1958, Vol. 23, Issue 2, pp. 206–215 [Abstract]
  • L. Stárka and A. Vystrčil
    Die chromatographische Trennung einiger Anthrachinonderivate
    1957, Vol. 22, Issue 5, pp. 1686–1688 [Abstract]
  • B. Stárková, A. Vystrčil and L. Stárka
    Darstellung von Nitroderivaten des Carbazols mittels der Graebe-Ullmannschen Synthese
    1957, Vol. 22, Issue 3, pp. 1019–1022 [Abstract]
  • C. Párkányi and A. Vystrčil
    Untersuchungen in der Thiochinazolonreihe III. Synthese und Desulfurierung von 1-Methyl-2-thio-3-phenyl-1,2-dihydrochinazolon-(4)
    1956, Vol. 21, Issue 6, pp. 1657–1658 [Abstract]
  • C. Párkányi and A. Vystrčil
    Untersuchungen in der Thiochinazolon-Reihe I. Über die Desulfurierung einiger 2-Thiochinazolon-(4)-derivate mit Raney-Nickel
    1956, Vol. 21, Issue 4, pp. 1007–1012 [Abstract]
  • C. Párkányi and A. Vystrčil
    Polarographie der Harnstoff- und Thioharnstoffderivate VIII. Anodische Depolarisation in Lösungen einiger 2-Mercaptochinazolone-(4)
    1956, Vol. 21, Issue 3, pp. 689–696 [Abstract]
  • A. Vystrčil and K. Kalfus
    Darstellung von 3-(β-Indolyl)-buttersäure aus 1-Hydroxy-2-carbazol-carbonsäure
    1954, Vol. 19, Issue 1, pp. 179–181 [Abstract]