Diethyl Malonate → HCID 135528464, compound

Participants

Reaction Steps

To a suspension of tert-butyl 3-[2-amino-3-formyl-6-(2-hydroxyphenyl)4-pyridinyl]-1-piperidinecarboxylate (0.86 g, 2.16 mmol) in ethanol (25 mL) were added diethyl malonate (6.93 g, 43.27 mmol) and piperidine (2.14 mL, 21.64 mmol) and, and the mixture was heated at reflux overnight. The mixture was allowed to cool to room temperature, and then diluted with ethanol. The resulting precipitate was collected by filtration, washed with ethanol and dried under reduced pressure to give ethyl 5-[1-(tert-butoxycarbonyl)-3-piperidinyl]-7-(2-hydroxyphenyl)-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate as a yellow solid (0.752 g, yield; 71%).

Provenance & Evidence