Diethyl Ether → HCID 22118326, compound

Participants

Reaction Steps

Sodium hydride (67 mg of 60%) was added to a stirred solution of ethyl 4-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2,4-dimethyl-3-oxo-pentanoate (0.4 g) in N,N-dimethylformamide at 0° C. lodomethane (0.1 ml) was added and stirring continued for 16 hours. Ether was added and the organic phase washed (brine), dried (magnesium sulphate), evaporated and the residue purified by column chromatography eluting with ethyl acetate/hexane (1:2) to give ethyl 4-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2,2,4-trimethyl-3-oxo-pentanoate (Compound 197, 0.3 g), NMR 1.21(3H, t), 1.47(6H, s), 1.52(6H, s), 1.92(3H, s), 4.13(2H, q), 5.16(2H, s), 7.2-7.4(5H, m).

Provenance & Evidence