Diethyl methylmalonate → HCID 68460666, compound

Participants

Reaction Steps

To a slurry of sodium hydride (95%, 0.025 g, 1.0 mmol) in 5 mL anhydrous THF at 0° C. under an atmosphere of N2 was added 2-methyl-malonic acid diethyl ester (0.174 g, 1.0 mmol) dropwise. The mixture was stirred for 30 minutes at ambient temperature, treated with the product from Example 24a (0.047 g, 1.0 mmol), microwave at 120° C. for 1 hour, cooled, partitioned between ethyl acetate and water and neutralized with 1M HCl. The aqueous layer was extracted by ethyl acetate and the combined organic layers were dried over Na2SO4, filtered and concentrated under vacuum giving the crude title compound. The residue was purified by chromatography on silica eluting with 1% methanol in dichloromethane to give the title compound (0.031 g, 62%). 1H NMR (300 MHz, DMSO-D6) δ ppm 1.14 (t, J=7.17 Hz, 3H) 1.52 (d, J=7.35 Hz, 3H) 2.04 (s, 3H) 2.30 (s, 3H) 4.10 (m, 3H) 6.17 (s, br, 1H) 7.04 (m, 3H) 7.26 (d, J=8.82 Hz, 2H) 7.48 (d, J=7.35 Hz, 1H) 7.57 (d, J=8.46 Hz, 2H) 8.45 (d, J=8.46 Hz, 1H) 8.78 (d, J=8.82 Hz, 1H) 9.11 (s, 1H) 10.05 (s, 1H); (ESI+) m/z 501 (M+H)+.

Provenance & Evidence