Very efficient, reusable copper catalyst for carbene transfer reactions under biphasic conditions using ionic liquids.
[reaction: see text] The complex {[HC(3,5-Me(2)pz)(3)]Cu(NCMe)}BF(4) catalyzes the transfer of the :CHCO(2)Et unit from ethyl diazoacetate to several saturated and unsaturated substrates with very high yields and under biphasic conditions using the ionic liquid [bmim][PF(6)] and hexane as the reaction medium. The catalyst has been tested for several cycles of recovery and reuse without any loss of activity.
Laboratorio de Catálisis Homogénea, Departamento de Química y Ciencia de los Materiales, Unidad Asociada al CSIC, Campus de El Carmen s/n, Universidad de Huelva, 21007-Huelva, Spain.
Pilar
P
Rodríguez
Ana
A
Caballero
M Mar
MM
Díaz-Requejo
M Carmen
MC
Nicasio
Pedro J
PJ
Pérez