Zobrazeno 1 - 10
of 46
pro vyhledávání: '"S. Hilgard"'
Publikováno v:
Carbohydrate Research. 343:2789-2796
The crystal structures of a complete series of configurational isomers of 2,3-epimino and 3,4-epimino derivatives of 1,6-anhydro-β-D-hexopyranoses were determined by single-crystal X-ray analysis. The structures exhibited conformational rigidity wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b1b0fd7efd622d884fa637f0f904b08
https://doi.org/10.1016/j.carres.2008.05.025
https://doi.org/10.1016/j.carres.2008.05.025
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76a33f23c5d6a80c0dc3a8bdb204394f
https://doi.org/10.1135/cccc20030751
https://doi.org/10.1135/cccc20030751
Publikováno v:
Collection of Czechoslovak Chemical Communications. 60:619-635
A series of derivatives with various oxygen functionalities in positions 17,22a or 19,20 was prepared from diene I and olefin XVI by addition and oxidation reactions. The structure of the obtained compounds was confirmed by 1H NMR, 13C NMR and IR spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4df40cb3461762ec0e1382f804b65397
https://doi.org/10.1135/cccc19950619
https://doi.org/10.1135/cccc19950619
Publikováno v:
Collection of Czechoslovak Chemical Communications. 58:1675-1691
The triterpenoid α-diketone with oxabicyclo[2.2.2]octane system in the ring E (3β-acetoxy-21,22-dioxo-18α,19βH-ursan-28,20β-olide (I)) gives isopropylidenedioxy derivative II and dimeric compounds V and IX when submitted to chromatography on sil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a89804a12740d42dd65535d80d37f712
https://doi.org/10.1135/cccc19931675
https://doi.org/10.1135/cccc19931675
Publikováno v:
ChemInform. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d48d298642238cf58f45c901558f8b0c
https://doi.org/10.1002/chin.199133249
https://doi.org/10.1002/chin.199133249
Publikováno v:
Collection of Czechoslovak Chemical Communications. 56:966-972
Infrared spectra of triterpenoid 19β,28-epoxy-18α-oleanane 3-ketones I - VI in the region of carbonyl stretching frequencies have been studied. Comparison of the spectra of crystals with those of solutions in various solvents, together with compari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20fb1256771995c8574bbc9fef48acd1
https://doi.org/10.1135/cccc19910966
https://doi.org/10.1135/cccc19910966
Publikováno v:
ChemInform. 34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd27fa88c677172677030bf7442a7187
https://doi.org/10.1002/chin.200332125
https://doi.org/10.1002/chin.200332125
Publikováno v:
Collection of Czechoslovak Chemical Communications. 54:737-750
The crystal structure of allobetulone (I) has been determined. The compound is orthorhombic, P212121, a = 14.824(4), b = 25.701(7), c = 6.545(2) *A, Z = 4, R = 0.050 for 2 303 observed reflections. The rings B, C, D and E assume chair conformation, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6e7760832cbb39de50cd9837d9cc644
https://doi.org/10.1135/cccc19890737
https://doi.org/10.1135/cccc19890737
Publikováno v:
Collection of Czechoslovak Chemical Communications. 40:1801-1810
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62fea006bb8fdb4e27e1d737fc528b7c
https://doi.org/10.1135/cccc19751801
https://doi.org/10.1135/cccc19751801
Publikováno v:
Collection of Czechoslovak Chemical Communications. 41:770-779
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db7fd73b6f516d95ca6f0a66db86834a
https://doi.org/10.1135/cccc19760770
https://doi.org/10.1135/cccc19760770