Recyclable and Reusable [RuCl2(p-cymene)]2/Cu(OAc)2/PEG-400/H2O System for Oxidative C–H Bond Alkenylations: Green Synthesis of Phthalides
摘要:
[RuCl2(p-cymene)](2) in a mixture of poly(ethylene glycol) (PEG-400) and water is shown to be an extremely efficient catalyst for the cross-dehydrogenative C-H bond alkenylation reaction between benzoic acids and alkenes. The reaction could be conducted at 80 degrees C using Cu(OAc)(2). H2O as oxidant, yielding a variety of phthalide derivatives in good to excellent yields. More importantly, both [RuCl2(p-cymene)](2) and Cu(OAc)(2) in the PEG-400/H2O system could be easily recycled and reused six times without any loss of catalytic activity.
Ruthenium-Catalyzed Oxidative C–H Bond Alkenylations in Water: Expedient Synthesis of Annulated Lactones
作者:Lutz Ackermann、Jola Pospech
DOI:10.1021/ol201563r
日期:2011.8.19
Ruthenium-catalyzed cross-dehydrogenative C-H bond alkenylations occurred efficiently in environmentally benign water, which was exploited for an oxidative phthalide synthesis with ample scope. Mechanistic studies provided strong evidence for the oxidative alkenylation to proceed by an irreversible C-H bond metalation via acetate assistance.
Recyclable and Reusable [RuCl<sub>2</sub>(<i>p</i>-cymene)]<sub>2</sub>/Cu(OAc)<sub>2</sub>/PEG-400/H<sub>2</sub>O System for Oxidative C–H Bond Alkenylations: Green Synthesis of Phthalides
作者:Hong Zhao、Tinli Zhang、Tao Yan、Mingzhong Cai
DOI:10.1021/acs.joc.5b01388
日期:2015.9.4
[RuCl2(p-cymene)](2) in a mixture of poly(ethylene glycol) (PEG-400) and water is shown to be an extremely efficient catalyst for the cross-dehydrogenative C-H bond alkenylation reaction between benzoic acids and alkenes. The reaction could be conducted at 80 degrees C using Cu(OAc)(2). H2O as oxidant, yielding a variety of phthalide derivatives in good to excellent yields. More importantly, both [RuCl2(p-cymene)](2) and Cu(OAc)(2) in the PEG-400/H2O system could be easily recycled and reused six times without any loss of catalytic activity.