Rhodium-catalyzed coupling of α-lactams with indole derivatives
作者:Hannah K. Box、K.G. Upul Kumarasinghe、Radhika R. Nareddy、Gopalakrishna Akurathi、Amarraj Chakraborty、Babatunde Raji、Gerald B. Rowland
DOI:10.1016/j.tet.2014.10.049
日期:2014.12
for the formation of a C–N bond between the C–3 carbon of α-lactams and the nitrogen atom of indoles. A general procedure for the coupling of indoles and α-lactams in only 25 min with high yield is reported. The scope of the reaction was extended by the development of a method for the in situ generation of less stable phenyl-substituted α-lactams. The developed method provides an atom-economical method
A high-yielding general synthesis of α-lactams (aziridinones) is described. An α-haloamide 1 precursor is cyclized by sodium hydride in the presence of 15-crown-5 ether at room temperature, using dichloromethane as the solvent. The hy-products, hydrogen gas and sodium halide. are easily removed. The yields for the six known α-lactams (2b-g) chosen for this study are comparable or superior to previously