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
Antenna-Initiated Photochemistry in Polyfunctional Steroids. Intramolecular Singlet and Triplet Energy Transfer between Aryl, Ketone, and Alkene Groups in 6β-(Dimethylphenylsiloxy)-5β-androstanes<sup>1</sup>
作者:S. Anna Jiang、Changhe Xiao、Harry Morrison
DOI:10.1021/jo952202x
日期:1996.1.1
Steroids have been prepared that bear a dimethylphenylsiloxy (DPSO) group and additional C3 and/or C17 ketone functionalities. The DPSO group has been used to harvest 266 nm photons and then activate the ketone functionalities through intramolecular singlet-singlet energy transfer (intra-SSET). Thus, the monoketones 3,3-(ethylenedioxy)-6beta-(DPSO)-5beta-androstan-17-one (6) and 6beta-(DPSO)-5beta-androstan-3-one
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