Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Jan Sejbal"'
Publikováno v:
CHIMIA, Vol 53, Iss 11 (1999)
Biotin- and FITC-labelled water-soluble poly(acrylamide) derivatives of phosphorylcholine were prepared by coupling either maleinylated (a) or periodate-oxidized (b) L-glyceryl phosphorylcholine to poly-(acrylamide-allylamine) copolymer. Biotinylated
Externí odkaz:
https://doaj.org/article/eb3912ef6ad5417996842bdfde89a947
Publikováno v:
Helvetica Chimica Acta. 92:2795-2801
The two previously unreported esters 1 and 2 of pentane-2,4-diol and p-coumaric acid (=3-(4-hydroxyphenyl)prop-2-enoic acid) along with 13 known compounds including 6 oleanane- and ursane-type triterpenoids were isolated from MeOH extracts of the ste
Publikováno v:
Collection of Czechoslovak Chemical Communications. 71:179-189
Acid-base properties and aggregations of 9-(alkylsulfanyl)- and 9-(arylsulfanyl)acridine derivatives were studied as a part of systematic study of physicochemical properties of these compounds synthesized as potential drugs. The effect of the (2-hydr
Publikováno v:
Collection of Czechoslovak Chemical Communications. 71:387-410
New oleanane type triterpenoids with the 5(6) double bond were prepared using partial demethylation on carbon C-4. The starting compound was 23-hydroxybetulin (1b) and the key reaction was the methylation of 19β,28-epoxy-24-nor-18α-olean-4-en-3-one
Publikováno v:
Collection of Czechoslovak Chemical Communications. 71:1131-1160
New lupane-type triterpenoids with 5(6) double bond were prepared using the method of partial demethylation on carbon C-4. Hydroboration of the double bond led to 6α-hydroxy derivative. By the oxidation and following reduction of 6α-hydroxy derivat
Publikováno v:
Collection of Czechoslovak Chemical Communications. 71:423-433
Dinuclear rhodium(I) complex [{RhI(cod)}2(μ-OC6H4-2-Me)2] (1), exhibits the syn-anti isomerism consisting in the orientation of methyl groups of the bridge ligands with respect to the plane or distorted plane involving Rh and O atoms. The syn isomer
Publikováno v:
Collection of Czechoslovak Chemical Communications. 68:751-778
Anhydrides of 3β,28-diacetoxy-21,22-secolup-18-ene-21,22-dioic acid (1) and (19R)-3β,28-diacetoxy-18β,19-epoxy-21,22-secolupane-21,22-dioic acid (11) undergo alkaline hydrolysis yielding the corresponding dicarboxylic acids. Depending on reaction
Publikováno v:
Journal of Porphyrins and Phthalocyanines. :514-526
The photodynamic sensitizers zinc(II)- and palladium(II)-5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrins and 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin form 1:1 and/or 1:2 supramolecular complexes with native cyclodextrins (CD) and 2-hydroxypropy
Publikováno v:
Collection of Czechoslovak Chemical Communications. 65:1339-1356
Oxidation of 19β,28-epoxy-18α-oleanan-3-one (1) with chromium(VI) oxide in acetic acid leads to the formation of the 1β,3β;19β,28-diepoxy-3-hydroxy-1,2-seco-18α-oleanano- 2,1α-lactone (2). Its structure follows from spectral data, molecular mo
Autor:
George Kotovych, Lourival D. Possani, Hitoshi Yamamoto, Jan Sejbal, John M. Stewart, Eunice J. York
Publikováno v:
Biopolymers. 49:277-286
The solution structure of a synthetic peptide, Cn2(1–15)NH2–S–S–acetyl–Cn2(52–66)NH2 from toxin 2 (Cn2) of the New World scorpion Centruroides noxius was determined using nmr and molecular dynamics calculations. The peptide has no signifi