Reaction of some coumarin and 4,6‐diaryl‐2<i>H</i>‐pyran derivatives with secondary amines

Abstract

Abstract The reaction of piperidine, morpholine, piperazine or dimethylamine with several coumarins, 3‐bromocoumarin, 4,6‐diaryl‐2 H ‐pyran‐2‐ones and 3‐bromo‐4,6‐diaryl‐2 H ‐thiopyran‐2‐ones gave o ‐hydroxycinnamic acid amides, benzofurans, open‐chain δ‐oxoamides and thiophene derivatives, respectively.