SYNTHETIC COMMUNICATIONS, 21(14), 1433-1441 (1991) AN EFFICIENT SYNTHESIS OF SUBSTITUTED 2H-PYRAN-2-ONE DERIVATIVES VIA THE CONJUGATED ADDITION OF THE ENOLATES OF CARBONYL COMPOUNDS TO ENAMINOESTERS+ * Ayhan S. Demir , Cihangir Tanyeli, Rezzan Urkmez-Karaaslan and Tugmac Sayrac Department of Chemistry, Middle East Technical University 06531 Ankara, Turkey ... Page 8. 1440 DEMIR ET AL. ...