作者:Scott E. Denmark、Hayao Matsuhashi
DOI:10.1021/jo020050h
日期:2002.5.1
chiral fluoro ketones have been prepared and their potential as enantioselective catalysts for asymmetric epoxidation with Oxone has been evaluated. The tropinone-based ketone (-)-5 was easily prepared and showed excellent reactivity but only modest enantioselectivity. The biphenyl-based ketone (-)-6 was prepared in a somewhat lengthy synthesis (along with its monofluoro and geminal fluoro analogues)
制备了两种在结构上不同的手性氟酮,并评估了它们作为用Oxone不对称环氧化的对映选择性催化剂的潜力。肌钙蛋白基酮(-)-5易于制备,显示出出色的反应性,但对映选择性不高。联苯基酮(-)-6的合成过程有些冗长(连同其单氟和双氟类似物)。这种酮只表现出适度的反应性。需要30mol%的(-)-6以在合理的时间内实现完全转化。该催化剂的对映选择性通常更高,但又非常依赖于底物。