A Simple Method for Synthesis of Methylene Dioximes Using Poly(ethylene glycol)‐400 as a Phase Transfer Catalyst
作者:Aarti S. Shedge、Bhanudas P. Kavitake、Uday V. Desai、Prakash P. Wadgaonkar
DOI:10.1081/scc-200043184
日期:2004.1
Abstract A simple method for synthesis of methylene dioximes by reaction of ketoximes with dichloromethane in the presence of aqueous sodiumhydroxide solution using poly (ethyleneglycol)‐400 (PEG‐400) as a phase transfer catalyst is described.
The ionicliquid1-butyl-3-methylimidazoliumtetrafluoroborate, [bmim]BF4, has been demonstrated to be an effective catalyst for synthesis of methylene dioximes. These reactions proceed with excellent yields under shorter reaction times than other reported methods. Furthermore, the ionicliquid [bmim]BF4 can be recycled and reused without loss of catalytic activity.