Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Jiří Protiva"'
Publikováno v:
Collection of Czechoslovak Chemical Communications. 62:471-478
Lithocholic (1a), chenodeoxycholic (1b), deoxycholic (1c) and cholic acid (1d) were used for the synthesis of the title compouds. Reactions of O-acetyllithocholic acid chloride with piperidine, morpholine and 1-methylpiperazine gave the corresponding
Publikováno v:
Collection of Czechoslovak Chemical Communications. 62:1095-1104
21-Acetoxy-16α,17α-epoxypregn-4-ene-3,20-dione (1) enters a reaction with acetonitrile catalyzed by perchloric acid, giving unusual products with the furostane skeleton. In contrast to analogous reactions, the reaction with sodium azide results in
Autor:
Pavel Drašar, Eva Klinotová, Miroslav Protiva, Jiří Urban, Jiří Protiva, Jan Sejbal, Thi Thu Huong Nguyen
Publikováno v:
Collection of Czechoslovak Chemical Communications. 60:257-275
The bile acids Ia - Id (lithocholic, chenodeoxycholic, deoxycholic, cholic) and their derivatives (O-acetylated acids and O-acetylated acid chlorides) reacted under various conditions with 1,2-diaminobenzene, 2-aminophenol and 2-aminothiophenol and a
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:1420-1429
2,3-Seco-2,3-diacids of the 28-hydroxy-20(29)-lupene and 28-hydroxylupane series (VIIa and VIIb, respectively) and their derivatives VIII - XIV were prepared from 28-acetoxy-20(29)-lupen-3-one (IIIa) and 28-acetoxy-3-lupanone (IIIb), respectively, by
Autor:
Hana Malinová, Bohumil Máca, Eva Klinotová, Jiří Urban, Luděk Vlk, Jiří Protiva, Václav Křeček
Publikováno v:
Collection of Czechoslovak Chemical Communications. 58:2729-2736
Triazene derivatives of estrone and estradiol in position 2 and 4 were prepared. Their reaction with sodium iodide in an acid medium afforded the corresponding iodo derivatives. The 1H, 13C NMR and mass spectra of the compound prepared are discussed.
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 25
Publikováno v:
ChemInform. 25
Autor:
Pavel Drašar, Nguyen Thi Thu Huong Nguyen Thi Thu Huong, Jiří Protiva, Miroslav Protiva, Eva Klinotová, Jiří Urban, Jan Sejbal
Publikováno v:
ChemInform. 26