已经制备了具有二甲基苯基甲硅烷氧基(DPSO)基团和另外的C3和/或C17酮官能团的类固醇。DPSO基团已用于收获266 nm光子,然后通过分子内单重态-单重态能量转移(Intra-SSET)激活酮功能。因此,单酮3,3-(亚乙二氧基)-6beta-(DPSO)-5beta-雄烷-17-1(6)和6beta-(DPSO)-5beta-雄烷-3-1(8)均显示DPSO引发的羰基上的光化学。辐照二酮6beta-(DPSO)-5beta-androstane-3,17-dione(5),得到两个D环衍生的光产物,一个差向异构体(19)和一个烯醛(18),它们都来自C17酮。兴奋的单重态。在这里,从芳基天线到羰基的Phi(in-SSET)约为。88%的效率,发生率约为 6.5 x 10(9)s(-)(1),化学指示C3和C17酮之间的内部SSET容易。C3处的亚烷基(例如,如6beta-(DPSO
已经制备了具有二甲基苯基甲硅烷氧基(DPSO)基团和另外的C3和/或C17酮官能团的类固醇。DPSO基团已用于收获266 nm光子,然后通过分子内单重态-单重态能量转移(Intra-SSET)激活酮功能。因此,单酮3,3-(亚乙二氧基)-6beta-(DPSO)-5beta-雄烷-17-1(6)和6beta-(DPSO)-5beta-雄烷-3-1(8)均显示DPSO引发的羰基上的光化学。辐照二酮6beta-(DPSO)-5beta-androstane-3,17-dione(5),得到两个D环衍生的光产物,一个差向异构体(19)和一个烯醛(18),它们都来自C17酮。兴奋的单重态。在这里,从芳基天线到羰基的Phi(in-SSET)约为。88%的效率,发生率约为 6.5 x 10(9)s(-)(1),化学指示C3和C17酮之间的内部SSET容易。C3处的亚烷基(例如,如6beta-(DPSO
Synthesis and biological inactivity of some 4.alpha.,6-cyclo steroids
作者:F. Thomas Bond、Walter Weyler、Bernard Brunner、Jeffrey E. Stemke
DOI:10.1021/jm00224a011
日期:1976.2
6-unsaturation replaces the usual 4,5-unsaturation. The synthetic routes involve intramolecular ketocarbene addition to a 5-6 double bond and intramolecular 1,3-elimination of 6beta-substituted 5beta-3-keto steroids. Both routes give 5beta products. The analogs of progesterone, testoterone acetate, and norethisterone have been prepared and shown to be remarkably biologically inactive when compared with the corresponding