Enantioselective Palladium-Catalyzed [3+2] Cycloaddition of Trimethylenemethane and Fluorinated Ketones
作者:Barry M. Trost、Guillaume Mata
DOI:10.1002/anie.201807308
日期:2018.9.17
undergoes palladium‐catalyzed [3+2] cycloadditions with fluorinated ketones to generate tetrasubstituted trifluoromethylated centers in high enantioselectivity under mild conditions. The generation of the palladium–TMM complex was achieved by a self‐deprotonation strategy, which shows remarkable improvements in regiocontrol, efficiency, and atom economy of asymmetric [3+2] cycloadditions. Moreover, the
腈取代的三亚甲基甲烷(TMM)供体与氟化酮进行钯催化的[3 + 2]环加成反应,在温和条件下以高对映选择性生成四取代的三氟甲基化中心。钯-TMM络合物的生成是通过自去质子化策略实现的,该策略显示了非对称[3 + 2]环加成反应的区域控制,效率和原子经济性的显着改善。此外,腈基的多功能性可直接获得各种合成有用的中间体,包括酰胺,醛和酯。发达的反应条件允许以优异的区域选择性和对映体选择性合成各种芳族,杂芳族和脂族氟化二氢呋喃。