Hexamethylphosphoramide → HCID 67345649, compound

Participants

Reaction Steps

According to the same manner as that of Example a-25 except that 0.25 g of 4-hydroxy-3-[3-[3-[(methoxycarbonylmethyl)aminocarbonyl]phenyl]-1-oxo-2-propenyl]-1,6-dimethyl-2(1H)-pyridinone was used in place of 4-hydroxy-3-[3-[3-(2-hydroxyethoxy)phenyl]-1-oxo-2-propenyl]-1,6-dimethyl-2(1H)-pyridinone, and 6 ml of hexamethylphosphoramide was used in place of dimethylformamide, 0.13 g of 4-methoxy-3-[3-[3-[(methoxycarbonylmethyl)aminocarbonyl]phenyl]-1-oxo-2-propenyl]-1,6-dimethyl-2(1H)-pyridinone [Compound No. (83a)] was obtained as a pale yellow crystal.

Provenance & Evidence