Iridium catalyzed acceptor/acceptor carbene insertion into N–H bonds in water
作者:Kankanala Ramakrishna、Chinnappan Sivasankar
DOI:10.1039/c7ob00177k
日期:——
class of carbenes. The present study reveals that [(COD)IrCl]2 is found to be an efficient catalyst for the A/A class of carbenes, and Pd2(dba)3 for the D/A class of carbenes, for insertion into N–H bonds in water under mild reaction conditions. A reactivity comparison study with different classes of carbenes revealed that silver based catalysts are the right choice for the D/D class of carbenes for insertion
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)