Studies in phenolic mannich bases - reaction with acetylenes - Balasubramanian, K.K.; Selvaraj, S. (Elsevier)
3-Formyl, 3-benzoyl and 2,3-dibenzoyl-4H-Chromenes have been synthesised by the reaction of phenolic Mannich bases with electron-deficient acetylenic systems.
http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(00)71523-1
Keywords: V