The Formation of Quinolin-2(1H)-ones via Electrocyclic Reaction of o-Isocyanatostyrenes Generated in situ from o-Isocyanostyrenes
A convenient one-pot preparation of 4-substituted or 3,4-disubstituted quinolin-2(1H)-ones from 2-isocyanostyrene derivatives, which involves mCPBA oxidation to the corresponding isocyanate intermediates followed by electrocyclization, is described.