Reaction of malonates with camphoranile synthesis of 4-hydroxy-2-pyridones attached to the bornane ring system

Article abstract of DOI:10.1002/jhet.5570430444

The reaction of camphoraniles 3a,b with "magic malonates" (bis-2,4,6-trichlorophenylmalonates) 4a,b leads to 4-hydroxy-2(1H)-pyridones attached to bornane ring system 6a-c in good yields. Less satisfactory yields were obtained with the diethyl malonate 5b