Synthesis of 6-Hydroxy Derivatives of Steroidal Hormones by SeO2 Mediated Oxidation
作者:Rainer Strommer、Claudia H�dl、Wolfgang Strauss、Reinhard Sailer、Ernst Haslinger、Hans Wolfgang Schramm、Christoph Seger
DOI:10.1007/s00706-004-0197-3
日期:2004.9
Selenium dioxide oxidation of molecules with cyclopentanoperhydrophenanthrene skeleton and allylic moieties, such as the well known human steroidalhormones progesterone and testosterone enables the syntheses of potential active 6β-hydroxysteriods.
Treatment of 3-oxo-4, 5-oxido steroids with lead tetraacetate results in acetoxylation in the 2α-position as could be shown by independent synthesis of the acetoxylated compounds. The products of this reaction rearrange even under very mild conditions (chromatography on silicagel or alumina) to the corresponding 2,3-dioxo-Δ4 compounds. The influence of structure and conformation of the various intermediates
Kitagawa, Isao; Nakanishi, Tsutomu, Chemical and pharmaceutical bulletin, 1981, vol. 29, # 5, p. 1299 - 1311
作者:Kitagawa, Isao、Nakanishi, Tsutomu
DOI:——
日期:——
Morisawa,Y.; Tanabe,K., Chemical and pharmaceutical bulletin, 1969, vol. 17, # 6, p. 1206 - 1211
作者:Morisawa,Y.、Tanabe,K.
DOI:——
日期:——
A facile two-step high yield approach to 2-oxasteroids
作者:Aryeh A. Frimer、Judith Hameiri-Buch、Shlomo Ripshtos、Pessia Gilinsky-Sharon
DOI:10.1016/s0040-4020(01)88175-8
日期:1986.1
generating rapidly (< 4 hrs) and in highyield the corresponding enol (2-hydroxy-3-oxo-Δ1,4 analog) When the reaction is then allowed to continue at room temperature for several days, the enol is further autoxidized to the related lactol (1-hydroxy-2-oxa-3-oxo-Δ4 analog) in overall yields generally in the range of 85–95%. Sodium borohydride reduction of the lactol yields the pharmacologically important