Steroidal diones and trione, bicyclic diones (7 and 8) and a tricyclic dione were adsorbed on silica gel and reduced with BH3.NMe3. The carbonyl groups at C-3 of the steroids, at C-4 of 7 and at C-3 of 8 were reduced regioselectively. The FT-IR spectra of 5α- and 5β-androstane-3,17-dione adsorbed on silica gel were measured.
类
固醇二酮和三酮、双环二酮(7 和 8)以及一种
三环二酮被吸附在
硅胶上,并用
BH3.NMe3 还原。类
固醇的 C-3、7 的 C-4 和 8 的 C-3 处的羰基被区域选择性还原。测量了吸附在
硅胶上的 5α- 和 5β-
雄甾烷-3,17-二酮的傅立叶变换红外光谱。