Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Jiri Krepinsky"'
Publikováno v:
Synthetic Communications. 7:149-152
In 1972 we proposed1 structure 3 for flavipucine, an antibiotic from an Aspergillus flavipes strain. Later we reported2 a novel reaction of 6-methyl-4-hydroxy-2-pyridone with α keto aldehydes which provided 1a from isobutylglyoxal and it was stated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ffcb0bc3160363259ba9ff03235cc6c
https://doi.org/10.1080/00397917708050726
https://doi.org/10.1080/00397917708050726
Publikováno v:
Phytochemistry. 14:525-527
A new simplified technique is described for the isolation and separation of phytoecdysones from kaladana seeds. Using this method ecdysone, crustecdysone, muristerone A, kaladasterone, calonysterone and makisterone A were obtained. In addition methyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d4ee769b81f9b27f42d626abfdf7cb4
https://doi.org/10.1016/0031-9422(75)85122-3
https://doi.org/10.1016/0031-9422(75)85122-3
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :745
Makisterone A was found to have an R-configuration at C-24; therefore its complete defined structure is 2β,3β,14α,20,22,25-hexahydroxy-5β,(20R, 22R,24R)-ergost-7-en-6-one (II).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e8d47286e12f56854b0927e4913b758
https://doi.org/10.1039/c39740000745
https://doi.org/10.1039/c39740000745
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :737
The structure of 2β,3β,6,20R, 22R,25-hexahydroxycholesta-5,8(9),14-trien-7-one (I) has been assigned to calonysterone, a phytoecdysone isolated from kaladana (I pomoea sp.), by 13C and 1H n.m.r. spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdc9f80141b951ac18d75e676cdcd1ce
https://doi.org/10.1039/c39730000737
https://doi.org/10.1039/c39730000737