1225-43-0Relevant articles and documents
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Elks,Shoppee
, p. 241,244 (1953)
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Marker
, p. 480 (1936)
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Ultrasound assisted zinc reactions in synthesis 2. A new Clemmensen-type reduction
Salvador,Sa E Melo,Campos Neves
, p. 361 - 362 (1993)
A mild and efficient method is described for the reduction of carbonyls to methylene groups. Under ultrasonic irradiation, deoxygenation of 3-oxosteroids with zinc dust in acetic acid or acetic acid/water was achieved in 15 minutes. The observed selectivity at C-3 in the presence of 17- and 20-oxo groups is discussed.
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Shoppee,Sly
, p. 345,353 (1959)
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Identification of a fossil sterane biomarker in crude oil - An androstane with a modified carbon skeleton
Bender, Matthias,Schmidtmann, Marc,Rullkoetter, Juergen,Summons, Roger E.,Christoffers, Jens
, p. 5934 - 5945 (2013/09/23)
Three constitutional isomers of androstane were prepared for comparison with three unknown fossil C19H32 organic biomarkers ("19A", "19B", and "19C" in elution order in geological samples from Oman. 3β-Methyl-A-nor-androstane was pre
Factors Affecting the Facial Selectivity in the Hydroboration of Steroidal Δ5-Enes
Arantes, Simone F.,Hanson, James R.,Liman, Mansur D.,Manickavasagar, Revathy,Uyanik, Cavit
, p. 2381 - 2397 (2007/10/03)
A comparison between the facial selectivity observed in the hydroboration of some androst-5-enes and B-norandrost-5-enes does not parallel the differences between the calculated force field energies of α- and β-cyclobutane models suggesting that in this case the facial selectivity is not determined by the four centre transition state but by the ease of formation of the initial ?-complexes between the alkene and the borane.