Zobrazeno 1 - 10
of 43
pro vyhledávání: '"ERWIN GLOTTER"'
Publikováno v:
ChemInform. 22
In view of the antitumour activity of withanolide E [(20S,22R)-5β,6β-epoxy-14α,17β, 20-trihydroxy 1-oxowitha-2,24-dienolide] and 4β-hydroxywithanolide E, synthetically modified analogues were prepared. In these compounds, the α-orientation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dad313735361be040803c842b6816442
https://doi.org/10.1002/chin.199128209
https://doi.org/10.1002/chin.199128209
Autor:
Marioara Mendelovici, Erwin Glotter
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :1735-1740
Treatment of 3β- and 3α-hydroxy-(acetoxy-)cholest-4-en-6-one and of 6β-and 6α-hydroxy-(acetoxy-)cholest-4-en-3-one with MCPBA gives two types of product, depending on the initial site of the peroxy acid attack. Attack at the carbonyl group gives
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f08ff2a084bddcd2b020f1667be5139a
https://doi.org/10.1039/p19920001735
https://doi.org/10.1039/p19920001735
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :739-745
In view of the antitumour activity of withanolide E [(20S,22R)-5β,6β-epoxy-14α,17β, 20-trihydroxy 1-oxowitha-2,24-dienolide] and 4β-hydroxywithanolide E, synthetically modified analogues were prepared. In these compounds, the α-orientation of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0623cb9024c876f26896d6e2e0b26418
https://doi.org/10.1039/p19910000739
https://doi.org/10.1039/p19910000739
Autor:
Anchel Schwartz, Erwin Glotter
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :224-227
In contrast to 2α-acetoxy-3-oxo- and 3α-acetoxy-2-oxo-5α-cholestane, which gave n.m.r. and c.d. spectra consistent with a chair conformation of ring A, the corresponding 5α-hydroxy-derivatives have spectral data indicative of twisted conformation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::095e9aeba073e18c89aabd94c8fcd211
https://doi.org/10.1039/p19780000224
https://doi.org/10.1039/p19780000224
Autor:
Erwin Glotter, I. Kirson
Publikováno v:
Journal of Natural Products. 44:633-647
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9e20f68db9b024572dc9d5a55833397
https://doi.org/10.1021/np50018a001
https://doi.org/10.1021/np50018a001
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2104-2108
The stereochemistry of the allylic alcohol (2) and of the epoxy-ketone (3) in the Westphalen-type rearranged steroid series has been elucidated. The n.m.r. spectra of various new and known compounds have been analysed, thus demonstrating the remarkab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2a10ad2e0f48b1def4b0b80ab0cd554
https://doi.org/10.1039/p19750002104
https://doi.org/10.1039/p19750002104
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :341-346
Four related steroidal lactones of the withanolide group possessing a 17α-oriented side chain have been characterised as (17S,20S,22R)-5β,6β-epoxy-14α,17,20-trihydroxy-1-oxowitha-2,24-dienolide [withanolide E (1)], (17S,20S,22R)-14α,l7,20-trihyd
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa0969ea181d631ddd1fd97a29d2bc8e
https://doi.org/10.1039/p19770000341
https://doi.org/10.1039/p19770000341
Autor:
Erwin Glotter, Martin Weissenberg
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :568-571
The formation of cis-and trans-epoxy-alcohols by treatment of steroidal epoxy-ketones with sodium borohydride is analysed in terms of the direction of attack on the corresponding unsubstituted ketones, and the steric hindrance exerted by the epoxide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c0c1ae23e2bb37bfb8f7d4dff01f402
https://doi.org/10.1039/p19780000568
https://doi.org/10.1039/p19780000568
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :531-534
The structure of the products obtained by treatment of (17S,2OS,22R)-5β,6β-epoxy-14α,17,20-trihydroxy-1-oxowitha-2,24-dienolide (withanolide E) with sulphuric acid in acetone solution has been reinvestigated. Whereas the major component is indeed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02dea33e483e3afd17b42c06f91928e4
https://doi.org/10.1039/p19800000531
https://doi.org/10.1039/p19800000531
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :1442-1445
The relative importance of polar and steric influences on the course of the acid-catalysed opening of several epoxycholestanes bearing a vicinal cis-hydroxy- or -acetoxy-group has been investigated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d29ada9abd8069cdebdf7797ed0c3023
https://doi.org/10.1039/p19760001442
https://doi.org/10.1039/p19760001442