Results 201 to 210 of about 7,631 (266)

ChemInform Abstract: Androstanes with Modified Carbon Skeletons.

ChemInform, 2011
Abstractsynthesis of steroid derivatives (I) ‐ (IV) for comparison with fossil organic biomarkers in geological ...
Jürgen Rullkötter, Sascha Norden, Matthias Bender, Jens Christoffers   +3 more
openaire   +3 more sources

ChemInform Abstract: Substituted Androstanes as Aromatase Inhibitors [PDF]

ChemInform, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire   +2 more sources

Site-selective hydroxylation of steroids via oxometalloporphinates covalently linked to ring D: introduction of hydroxyl groups into the C(9) and C(12) position of 5.alpha.-androstanes

, 1991
Oxidation of synthetic manganese(III) porphyrins attached to steroidal substrates at C(17) gives rise to hydrogen atom abstraction at C(9) and/or C(12), thereby leading to hydroxyl incorporation at these sites.
T. Stuk, P. Grieco, M. Marsh
semanticscholar   +1 more source

Pharmacogenetics of the Constitutive Androstane Receptor

Pharmacogenomics, 2007
The constitutive androstane receptor (CAR), a member of the NR1I group of nuclear hormone receptors, has been implicated in regulating the expression of genes that are critical in xenobiotic and endobiotic metabolism, uptake and elimination as well as genes involved in various other physiological processes. Hence, functional variation in CAR associated
openaire   +2 more sources

The synthesis of (–)-sandaracopimaradiene from androstane derivatives

J. Chem. Soc. C, 1966
The conversion of testosterone and 3β-hydroxyandrost-5-en-17-one into the diterpene sandaracopimaradiene is described. 4,4-Dimethyl-5α-androst-14-ene and its 17β-hydroxy-derivative were prepared by acid-catalysed isomerisation of the 5,7-dienes, hydrogenation, and further isomerisation of the resulting 8(14)-olefins.
S. Turner, R. C. Sheppard, C. E. Stehr, P. Johnston   +3 more
openaire   +3 more sources

Microbiological hydroxylation of steroids. V. The pattern of hydroxylation of dioxygenated 5 -androstanes with cultures of the fungus Calonectria decora.

Journal of The Chemical Society-perkin Transactions 1, 1972
Dioxygenated 5α-androstanes are more readily hydroxylated with Calonectria decora than the mono-oxygenated substrates studied previously. Oxygen functions in rings A and D act as primary directing groups and, when a blocking effect by middle ring ...
A. M. Bell, W. Denny, E. Jones, G. Meakins, W. E. Müller   +4 more
semanticscholar   +1 more source

ChemInform Abstract: CYCLOPROP(16ALPHA,17ALPHA)ANDROSTANE

Chemischer Informationsdienst, 1972
AbstractDas 3′H‐Cycloprop(16a,17a)‐5a‐androstan‐l 7β‐ol‐3‐on‐acetat (I) liefert bei der Dehydrierung mit Dichlordicyan‐benzochinon ein Gemisch der beiden Verbindungen (II) und (III).
R. W. Kierstead, K. E. Fahrenholtz, K. P. Meyers   +2 more
openaire   +3 more sources

Microbiological hydroxylation. XIV. Hydroxylation in the terminal rings of dioxygenated 5alpha-androstanes with the fungi Wojnowicia graminis and Ophiobolus herpotrichus.

Journal of The Chemical Society-perkin Transactions 1, 1975
Dioxo-5α-androstanes having one keto-group in a terminal ring (at position 3 or 2, or at position 17) and the second at a middle ring position (7 or 11) are hydroxylated in the other terminal ring (at 17 or 16, or at 3 or 2) by the fungi Wojnowicia ...
V. Chambers, E. Jones, G. Meakins, J. Miners, A. Wilkins   +4 more
semanticscholar   +1 more source

Syntheses of immunomodulating androstanes and stigmastanes: Comparison of their TNF-α inhibitory activity [PDF]

Bioorganic and Medicinal Chemistry, 2007
Javier A Ramírez
exaly   +2 more sources

Microbiological hydroxylation. Part XIX. The action of an ant fungus ('Acromyrmex fungus') on oxygenated androstanes, pregnanes, and cholestanes.

Journal of The Chemical Society-perkin Transactions 1, 1975
The title fungus readily metabolises oxygenated derivatives of androstane and pregnane, but not cholestane. With the androstanes and pregnanes three basic processes occur: hydroxylation at positions determined by the directing influences of the ...
E. Jones, G. Meakins, J. Miners, J. Pragnell, A. Wilkins   +4 more
semanticscholar   +1 more source