Insertion of Zerovalent Nickel into the N–N Bond of N-Heterocyclic-Carbene-Activated N2O
摘要:
Metal-mediated cleavage of the N-N bond is a rarely observed phenomenon in the chemistry of nitrous oxide (N2O). We demonstrate that, upon activation of N2O with N-heterocyclic carbenes, zerovalent nickel is able to insert into the N-N bond to give nitrosyl complexes.
Synthesis of Azoimidazolium Dyes with Nitrous Oxide
作者:Alexander G. Tskhovrebov、Lara C. E. Naested、Euro Solari、Rosario Scopelliti、Kay Severin
DOI:10.1002/anie.201410067
日期:2015.1.19
method for the synthesis of industrially important azoimidazoliumdyes is presented. The procedure is based on a reagent which is rarely used in the context of synthetic organic chemistry: nitrousoxide (“laughing gas”). N2O is first coupled to N‐heterocyclic carbenes. Subsequent reaction with aromatic compounds through an AlCl3‐induced CH activation process provides azoimidazoliumdyes in good yields