Novel and efficient heterogeneous polymer supported copper catalyst for synthesis of 2-substituted Benzoxazoles from 2-Haloanilides
作者:Thachora Venu Saranya、Pambingal Rajan Sruthi、Veena Raj、Saithalavi Anas
DOI:10.1016/j.jorganchem.2021.121733
日期:2021.4
A novel polymer supported copper complex is prepared by the immobilization of copper iodide on chemically modified polyacrylonitrile and its application in heterogeneous catalysis is described. The catalyst was prepared by easy method via synthetic modification of Polyacrylonitrile (PAN) using ethylene diamine followed by the complexation with CuI. After characterization, this complex was explored
Synthesis of Benzoxazoles by an Efficient Ullmann-Type Intramolecular C(aryl)-O Bond-Forming Coupling Cyclization with a BINAM-Copper(II) Catalyst
作者:Govindasamy Sekar、Ajay Naidu
DOI:10.1055/s-0029-1218589
日期:2010.2
benzoxazoles were synthesized from the corresponding N-(2-iodophenyl)benzamides through intramolecular C(aryl)-O bond formation via Ullmann-type coupling cyclization in the presence of a catalytic amount of an easily available BINAM-copper(II) complex under very mild reaction conditions (82 ˚C). Less reactive bromo and chloro analogues of the N-(2-halophenyl)benzamides were also successfully cyclized