Catalyst- and steric-controlled alkenylation via chemoselective C–H activation and C–Br activation in Heck reaction of methyl 1-(2-bromoaryl)-3-(2-furyl/thienyl)-5-oxopyrrolidine-2-carboxylates and diethyl 1-(2-bromoaryl)-3-(2-furyl/thienyl)-5-oxopyrrolidine-2,2-dicarboxylate derivatives
作者:Prasanta Patra、Jayanta K. Ray、Gandhi K. Kar
DOI:10.1016/j.tetlet.2010.05.005
日期:2010.7
Pd(II)-catalyzedalkenylation of methyl 1-(2-bromoaryl)-3-(2-furyl/thienyl)-5-oxopyrrolidine-2-carboxylate derivatives 1(a–d) resulted in the formation of 3(a–d) exclusively via C–H activation in the heteroaryl moiety. Similar observations were observed for the corresponding diester analogues 4(a–d) to form 5(a–d). Normal Heck reaction, however, was observed in the case of 1(a–f) to furnish 2(a–f)