Application of the acetate of baylis‐hillman adducts of salicylaldehydes in the synthesis of methyl 2‐oxo‐2,3‐dihydrobenzo[b]oxepine‐4‐carboxylates

A simple synthesis of several methyl 2-oxo-2,3-dihydrobenzo[b]oxepine-4-carboxylates from Baylis-Hillman adducts of O-benzyl protected 2-hydroxybenzadehydes has been described through the acetylation, cyanation, debenzylation, as well as acid assisted Pinner cyclization.