10.1021/ol006710r.s001 Qian Wang Qian Wang M. G. Finn M. G. Finn 2<i>H</i>-Chromenes from Salicylaldehydes by a Catalytic Petasis Reaction American Chemical Society 2000 chromene vinylboronic amine acid moiety Chromene variety cyclization aldehyde amines Catalytic Petasis Reaction component incorporation compound Salicylaldehyde condensation 2 H ejection heating vinylic preparation boronic salicylaldehyde hydroxy 2000-11-21 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/2_i_H_i_-Chromenes_from_Salicylaldehydes_by_a_Catalytic_Petasis_Reaction/3737553 The Petasis condensation of vinylic or aromatic boronic acids, aromatic aldehydes, and amines is assisted by a hydroxy group adjacent to the aldehyde moiety. The products derived from salicylaldehydes and vinylboronic acids undergo cyclization to 2<i>H</i>-chromene compounds with ejection of amine upon heating. A catalytic preparation of 2<i>H</i>-chromenes using resin-bound amine is reported, allowing the convenient incorporation of a variety of components.