Water → HCID 53877421, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 2-(2,3-dihydro-5-iodo-6-methyl-4-oxo-4H-1,3-oxazin-3-yl)-2-methylpropanoate (30.0 g), 2-(tributylstannyl)thiophene (33.5 ml), palladium bis-triphenylphosphine chloride (3.08 g) and lithium chloride (20.5 g) in tetrahydrofuran was heated at 50° C. for 24 hours. Further 2-(tributylstannyl)thiophene (2.8 ml) was added and the mixture heated for a further 18 hours. Palladium bis-triphenylphosphine chloride (0.62 g) was added and heating continued for 18 hours. The mixture was poured into water, extracted (ether) and the organic phase washed (brine), dried (magnesium sulphate) and evaporated. Purification by chromatography on silica gel gave ethyl [2,3-dihydro-6-methyl-4-oxo-5-(2-thienyl)-4H-1,3-oxazine-3-yl]-2-methylpropanoate (14.5 g), NMR 1.15(t,3H), 1.55(s,6H), 2.1(s,3H), 4.15(q,2H), 5.25(s,2H), 6.9-7.4(m,3H).

Provenance & Evidence