NEW SYNTHETIC ROUTES TO Β-POLYKETONE DERIVATIVES: REACTIONS OF 3-ACETYL-2-HYDROXY-6-METHYL-4H-4-PYRANONE AND 7-CHLORO-2,2-DIMETHYL-2H,4H,5H-PYRANO(4,3-D)-1,3-DIOXIN-4,5-DIONE WITH AN ENAMINE (STUDIES ON THE Β-CARBONYL COMPOUNDS CONNECTED WITH THE Β-POLYKE
The reaction of 1-morpholino-1-cyclohexene 2 with 3-acetyl-2-hydroxy-6-methyl-4H-4-pyranone 1 gave a condensation product 3, which was subsequently transformed into the 4-pyrone 4, the β-triketone 10 and the phenol 12.The reaction of 2 with 7-chloro-2,2-d