Palladium on carbon-diethylamine-mediated hydrodeoxygenation of phenol derivatives under mild conditions
作者:Akinori Mori、Tomoteru Mizusaki、Takashi Ikawa、Tomohiro Maegawa、Yasunari Monguchi、Hironao Sajiki
DOI:10.1016/j.tet.2006.11.060
日期:2007.1
under the Pd/C-catalyzed hydrogenation conditions in the presence of diethylamine and the method could also be applicable to the hydrodeoxygenation of morphine to afford 3-deoxy-7,8-dihydromorphine. Diethylamine is not only a scavenger of the corresponding methanesulfonic acid derivative, which is produced during the reaction progress, but also a strong promoter of the Pd/C-catalyzed reduction of aryl
我们发现,在二乙胺存在下,在Pd / C催化的氢化条件下,酚羟基很容易通过芳基磺酸盐脱氧,该方法也可用于吗啡的加氢脱氧,得到3-deoxy-7,8-dihydromorphine 。二乙胺不仅是在反应过程中产生的相应甲磺酸衍生物的清除剂,而且还是Pd / C催化的芳基磺酸盐还原的强促进剂。该催化剂体系由于其温和的反应条件,易于处理并且不需要特定的设备,因此可以为各种酚衍生物的脱氧提供通用的方法。