Side-chain metallation five-membered heterocycles

Side-Chain Metallation of Five-Membered Heterocycles... [Pg.55]

Side-chain metallation of five-membered heterocycles... [Pg.39]

Orthometallated complexes are intermediates in numerous cyclic carbonylation reactions involving aromatics with nitrogen donor groups in their side chains. For example, aromatic ketoximes and azobenzene are carbonylated at elevated temperatures and pressures with a cobalt carbonyl catalyst to form five-membered ring heterocycles in which a carbonyl group has replaced the metal in the presumed orthometallated intermediate ... [Pg.209]