Results 191 to 200 of about 7,631 (266)
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Bioconversion of phytosterols to androstanes by mycobacteria growing on sugar cane mud
Journal of Industrial Microbiology and Biotechnology, 2005C. Pérez +4 more
exaly +2 more sources
Biotransformation of 3-keto-androstanes by Gongronella butleri VKM F-1033
Journal of Molecular Catalysis B: Enzymatic, 2008Victoria V Fokina, Marina V Donova
exaly +2 more sources
Total synthesis of androstanes
Canadian Journal of Chemistry, 1979A total synthesis of androstane derivatives is described. The desired configuration at C8 and at C13 is achieved in a ring C forming SnCl4-catalyzed Diels–Alder reaction. The preparation of methyl Z-2-methyl-4-oxo-2-pentenoate and the cyclization of a keto ester to a steroid 15,17-dione are also reported.
Masatoshi Kakushima +4 more
openaire +3 more sources
ChemInform Abstract: Preparation of Androstanes Related to Aphidicolin.
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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.
UYANIK, CAVİT +4 more
openaire +4 more sources
ON THE FLUORESCENCE OF KETONES OF THE ANDROSTANE SERIES
Photochemistry and Photobiology, 1972Abstract— The fluorescence spectrum and relative intensity of several ketoandrostanes is investigated as a function of the position of the carbonyl group on the steroid skeleton. The fluorescence intensity, though very low, depends rather strongly on the position.
A. Weinreb, A. Werner
openaire +3 more sources
Androstane Therapy of Aplastic Anaemia
Acta Haematologica, 1972Androstane therapy in 34 new cases of aplastic anaemia together with the follow-up in 33 cases previously reported is evaluated. Thenew cases were of the acquired variety and had a hypoplastic marrow.
L Duarte +3 more
openaire +3 more sources
Significant steroids: effective and general synthesis of 4alpha- and 4beta-amino-5alpha-androstanes.
Chemical Communications, 20094alpha-Aminosteroids were synthesized by the substitution of a 2alpha-bromo ketone using K(2)CO(3) as an activator; 4beta-aminosteroids were synthesized in excellent yields by a highly regioselective and trans-stereospecific ring opening of a steroidal 3,
Xianbing Ke +6 more
semanticscholar +1 more source
Substituted androstanes as aromatase inhibitors
, 2010The synthesis and structure–activity relationships of inhibitors of steroid aromatase which catalyses the last stage of a multistep biotransformation of cholesterol into estrogens, viz., aromatisation of C19-steroids into C18-phenolic steroids, are ...
I. Levina
semanticscholar +1 more source
An update on the constitutive androstane receptor (CAR)
dmdi, 2013Abstract The constitutive androstane receptor (CAR; NR1I3) has emerged as one of the main drug- and xenobiotic-sensitive transcriptional regulators. It has a major effect on the expression of several oxidative and conjugative enzymes and transporters, and hence, CAR can contribute to drug/drug interactions.
Jenni Küblbeck +4 more
openaire +2 more sources
, 1996
The synthesis and anti-inflammatory potencies of a new class of 17β-thioalkyl-16α,17α-ketal and -acetal androstanes are described. This new class of steroids was made by fragmentation of 2-thioxo-1,2-dihydropyrid-1-yl esters of the corresponding 17-acids
M. Ashton +7 more
semanticscholar +1 more source
The synthesis and anti-inflammatory potencies of a new class of 17β-thioalkyl-16α,17α-ketal and -acetal androstanes are described. This new class of steroids was made by fragmentation of 2-thioxo-1,2-dihydropyrid-1-yl esters of the corresponding 17-acids
M. Ashton +7 more
semanticscholar +1 more source