1.
J Org Chem
; 73(12): 4559-67, 2008 Jun 20.
Article
in English
| MEDLINE
| ID: mdl-18489157
ABSTRACT
Piperine, a natural product containing a conjugated diene, was reacted with polymer-supported acyl- and arylnitroso dienophiles. The reactions with arylnitroso dienophiles were also carried out in solution. The oxazine rings formed by the corresponding hetero-Diels-Alder reactions were further transformed and novel acyclic as well as heterocyclic derivatives including pyrroles and quinoxalinones were prepared.