Ethyl bromoacetate → HCID 22034120, compound

Participants

Reaction Conditions

Reaction Steps

Slowly add dropwise ethyl bromoacetate (23 mL; 0.21 mol) over a 3-hour period to a mixture of 2-(2-pyridinyl)-2-(2,4,6-trimethylphenyl)-ethanenitrile (22.3 g; 0.094 mol) and potassium carbonate (78 g; 0.57 mol) suspended in DMSO (100 mL). Stir the mixture for 1 day, pout into on aqueous NH4Cl solution (ca. 1 L), and extract with 3×200 mL of Et2O. Wash the combined extracts with saturated brine, dry over Na2SO4, filter, and concentrate in vacuo. Dissolve the residue in THF (200 mL), cool to 0° C. and add slowly in portions potassium t-butoxide (12 g; 0.11 mol) over a 10-minute period, After 30 minutes at 0° C., dilute the mixture with aqueous NH4Cl and extract with 2×150 mL of 50% Et2O in hexane. Wash the combined extracts with saturated brine, dry over Na2SO4, filter, concentrate in vacuo, and purify by column chromatography on silica gel (eluent: 5 to 10% EtOAc in hexane) to obtain the title compound as an oil: 1H NMR (400 MHz, CDCl3) δ 1.47 (t, 3 H), 2.06 (s, 6 H), 2.35 (s, 3 H), 4.46 (br q, 2 H), 6.6 (br t, 1 H), 6.75 (d, 1 H), 6.9 (br t, 1 H), 7.00 (s, 2 H), 9.4 (1 H).

Provenance & Evidence