Ruthenium-Catalyzed Addition of Carbon–Hydrogen Bonds in Aromatic Ketones to Olefins. The Effect of Various Substituents at the Aromatic Ring
作者:Motohiro Sonoda、Fumitoshi Kakiuchi、Naoto Chatani、Shinji Murai
DOI:10.1246/bcsj.70.3117
日期:1997.12
To obtain further insight into the new ruthenium-catalyzed reaction of carbon–hydrogen bonds in aromatic ketones with olefins, the effect of various substituents at the aromatic ring is examined. Reaction of o-methylacetophenone with triethoxyvinylsilane (2) in the presence of [Ru(H)2(CO)(PPh3)3] (3)as the catalyst gave the 1 : 1 addition product in quantitative yield. Similarly, the ketone having
为了进一步了解钌催化芳香酮中碳氢键与烯烃的新反应,研究了芳香环上各种取代基的影响。在作为催化剂的[Ru(H)2(CO)(PPh3)3](3)存在下,邻甲基苯乙酮与三乙氧基乙烯基硅烷(2)的反应以定量收率得到1:1的加成产物。类似地,具有o-CF3基团的酮以92%的产率得到偶联产物9。然而,邻位取代基如 OMe、F 和 CN 似乎会与催化剂反应并杀死催化剂,因此无法实现有效的反应。在对甲氧基和对氟苯乙酮与 2 反应的情况下,得到相应的 1:2 加成产物作为主要产物。在 m-取代的苯乙酮的情况下,邻位有两个不同的 C-H 键。C-C 键的形成优先发生在空间上不太拥挤的位置。间甲氧基和间氟苯乙酮的反应除外,...