Photochemische Studien, 65. Mitt.: Untersuchungen zur Photostabilität von Ethisteron und Norethisteron sowie deren Kristallstrukturen

摘要

UV irradiation of ethisterone (1) and norethisterone (2) in the solid state yielded one photoproduct each: 17,20-epoxy-17ξH-pregna-4,20-diene-3-one (3) and the dimerization product 17′-hydroxy-(13βH, 17′βH)-13,17-seco-20, 21bipregnayl-4,20,4′-trien-20′-in-3,17,3′-trione (4), respectively. Compounds3and4were characterized by their spectral and analytical data and further confirmed by the molecular packing of1and2in the crystal, as shown by X-ray cry