The Bromination of 13α-Androstan-15-one

Isolation of i-androstan-6-ol-17-one from urine of patients with adrenal neoplasm.

Bromination of Alkenes

The two most common halogenation reactions are chlorination and bromination. The addition of these halogens to alkenes yields 1,2-dihalides. Chlorinations reactions are used to synthesize over 6 million tons per year of ethylene dichloride (1,2-dichloroethane) for use as a solvent and for subsequent polymerization to produce poly(vinylchloride) known more commonly as PVC which is used for plumb...

The incubation of 13α,17-dihydroxystemodane with Cephalosporium aphidicola.

The biotransformation of 13α,17-dihydroxystemodane (3) with the fungus Cephalosporium aphidicola afforded 13α,17,18-trihydroxystemodane (4), 3β,13α,17-tri-hydroxystemodane (5), 13α,17-dihydroxy-stemodan-18-oic acid (6), 3β,11β,13α,17-tetra-hydroxystemodane (7), 11β,13α,17,18-tetrahydroxystemodane (8) and 3β,13α,17,18-tetra-hydroxystemodane (9). The hydroxylation at C-18 of the substrate points ...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

The Conversion of Testosterone to 5 ~-Androstan-17~-ol-3-one by Rat Prostate in Viwo and in Vitro*

The identity of the nonpolar transformation products of testosterone-1,S3H, the time course of the appearance of these metabolites in various tissue compartments, and the subcellular distribution of testosterone and its metabolites in prostate have been investigated following the intravenous administration of the hormone to normal and to functionally hepatectomized rats. Evidence has been obtai...