Ethyl bromoacetate → HCID 19874452, compound

Participants

Reaction Steps

A dispersion of 530 mg of 60% sodium hydride in mineral oil and 10 ml of DMF is treated, dropwise, with a solution of 1.50 g (6.6 mmol) of 5-(2-hydroxyphenyl)-6-methyl-2-oxo1,2-dihydro-3-pyridinecarbonitrile in 20 ml of DMF. The reaction is stirred 30 min at RT, then cooled in an ice bath and 1.11 g (6.6 mmol) of ethyl bromoacetate in 30 ml of DMF is added dropwise. The reaction is allowed to slowly come to RT and stirred overnight under N2. The mixture is concentrated under vacuum, the residue taken up in 80 ml of water and extracted with EtOAc. The aqueous phase is acidified to pH=5 with 10% HCl and extracted with EtOAc (4×80 ml). The combined EtOAc extracts are dried (MgSO4) and the solvent removed to leave an orange solid. This solid is recrystallized from EtOAc to give 740 mg of 5-(2-carboethoxymethoxyphenyl)-6-methyl-2-oxo-1,2 -dihydro-3-pyridinecarbonitrile as a yellow solid, m.p. 188°-190° C. Yield, 37%. 1H-NMR (d6 -DMSO): δ1.20 (t,3H): 2.18 (s,3H); 4.15 (q,2H); 4.80 (s,2H); 7.0 (q,2H); 7.20 (d,1H); 7.35 (t,1H); 8.00 (s,1H).

Provenance & Evidence