Metal catalysed reactions of β,β′-tricarbonyl derivatives with isocyanates
作者:Augusto C. Veronese、Elisa Durini、Valerio Bertolasi、Marino Basato、Cristina Tubaro
DOI:10.1016/j.tet.2010.07.070
日期:2010.10
The reactions of β,β′-tricarbonyl derivatives with isocyanates are catalysed by 2 mol % transition metal acetylacetonates (e.g., [Co(acac)2] and [Zn(acac)2]) at room temperature. 3-Oxo-1,5-pentanedioic acid dimethylester (1) reacts with RNCO (R=Et, CH2CHCH2, CH2Ph, Ph, 4-Cl–Ph) to give 1:1 adducts involving the formation of a new C–C bond between the intercarbonylic methylene and the isocyanato group