Synthesis of <i>a</i><i>nti</i>- and <i>s</i><i>yn</i>-Diol Epoxides of <i>trans</i>-3,4-Dihydroxy-3,4-dihydrobenzo[<i>g</i><i>hi</i>]fluoranthene: Model Planar Diol Epoxides
作者:Hui-Fang Chang、Bongsup P. Cho
DOI:10.1021/jo9907944
日期:1999.12.1
We describe the preparation of anti- and syn-3,4-dihydroxy-5,5a-epoxy-3,4,5,5a-tetrahydrobenzo[ghi]fluoranthene (2 and 3) as model planar diol epoxides. These compounds were synthesized by a dihydroarene method in 10 steps starting from 4H-cyclopenta[def]phenanthrene. These are the first examples of diol epoxides in which a five-membered ring is fused to the saturated ring bearing an epoxide group, and they are the rigid analogues of the extensively studied benzo[c]phenanthrene diol epoxides (5 and 6). In accord with expectation, (1)H NMR data indicated that the diol conformations of 2 and 3 are locked into diequatorial and diaxial conformations, respectively, and thus are suitable for comparative DNA binding studies.