Diginin. 3. Mitteilung. Abbau des Diginigenins zu einem Kohlenwasserstoff Diginan C21H36
作者:C. W. Shoppee
DOI:10.1002/hlca.19440270128
日期:——
Photochemische Reaktionen. 76.Mitteilung [1]. UV.-Bestrahlung von 11-Oxo-Steroiden V Die Photoisomerisierung von 3,20-Di�thylendioxy-5?,14?,17?-pregnan
The UV.-isomerisation of 11-oxo-14β,17α-pregnane 9 to the 11,19-cyclo-derivative 11 is described. In addition the Pb(OAc)4-fragmentation of photoproduct 11 was investigated. 11 yielded besides the expected 11-oxo-19-hydroxy-pregnane 18 the novel 9,11-seco-11,19-cyclosteroid 19. The structure of 19 was established by chemical transformations and subsequently confirmed by X-ray analysis [2].