Water-Soluble Chiral Ruthenium(II) Phenyloxazoline Complex: Reusable and Highly Enantioselective Catalyst for Intramolecular Cyclopropanation Reactions
作者:Abdel-Moneim Abu-Elfotoh、Diem Phuong Thi Nguyen、Soda Chanthamath、Kesiny Phomkeona、Kazutaka Shibatomi、Seiji Iwasa
DOI:10.1002/adsc.201200508
日期:2012.12.14
The intramolecular cyclopropanation of various trans-allylic diazoacetates and alkenyl diazoketones has been achieved with excellent enantioselectivities of up to 98% ee and in quantitative yields by using a water-soluble ruthenium(II)/hydroxymethyl(phenyl)oxazoline catalyst in a water/ether biphasic medium. The catalyst could be reused at least five times.
通过在水/醚中使用水溶性钌(II)/羟甲基(苯基)恶唑啉催化剂,已经实现了各种反式烯丙基重氮乙酸酯和烯基重氮酮的分子内环丙烷化,具有高达98%ee的优异对映选择性,并以定量产率获得双相介质。催化剂可以重复使用至少五次。