A facile metal-free tandem ring-opening/ring-closing strategy was developed for the synthesis of oxazolines in good to excellent reaction yields under mild reaction conditions. This reaction essentially describes a novel tool for the heterocyclic conversion of benzoxazin-4-ones to 2,5-disubstituted oxazolines directly in one-pot.
Intramolecular oxyacetoxylation of N-allylamides: an expeditious synthesis of oxazolines and oxazines by using a PhI(OAc)<sub>2</sub>/hydrogen fluoride–pyridine system