Tridentate Nickel(II)-Catalyzed Chemodivergent C–H Functionalization and Cyclopropanation: Regioselective and Diastereoselective Access to Substituted Aromatic Heterocycles
作者:Ekta Nag、Sai Manoj N. V. T. Gorantla、Selvakumar Arumugam、Aditya Kulkarni、Kartik Chandra Mondal、Sudipta Roy
DOI:10.1021/acs.orglett.0c02138
日期:2020.8.21
Schiff-base nickel(II)-phosphene-catalyzed chemodivergent C–H functionalization and cyclopropanation of aromatic heterocycles is reported in moderate to excellent yields and very good regioselectivity and diastereoselectivity. The weak, noncovalent interaction between the phosphene ligand and Ni center facilitates the ligand dissociation, generating the electronically and coordinativelyunsaturated active
Alkenyl C−H Insertion of Iodonium Ylides into Pyrroles: Studies toward the Total Syntheses of Tolmetin and Amtolmetin Guacil
作者:Christina Batsila、Efstathios P. Gogonas、George Kostakis、Lazaros P. Hadjiarapoglou
DOI:10.1021/ol0343008
日期:2003.5.1
[GRAPHICS]The thermal-catalyzed or photochemical reaction of iodonium ylides with pyrroles yields exclusively alpha-substituted pyrroles in moderate to good yields.
Reaction of dimethyl diazomalonate and ethyl 2-diazoacetoacetate with N-methylpyrrole