3-Buten-2-one, 4-methoxy- → HCID 178495556, compound

Participants

Reaction Conditions

Reaction Steps

LiHMDS (1M in THF, 88 mL, 2 eq) is added dropwise to a cold (−78° C.) solution of 4-methoxy-3-buten-2-one (8.8 mL, 88 mmol, 2 eq) in THF (300 mL). After a 30 min stirring at −78° C., a solution of 1-methyl-cyclopropanecarbonyl chloride (Step 40.8) (5.19 g, 44 mmol) in THF (100 mL) is added. The resulting mixture is allowed to warm to rt over 2 h and quenched by addition of a saturated solution of NH4Cl. THF is removed under vacuum. The concentrated mixture is extracted with Et2O. The organic phase is washed with brine (2×150 mL), dried (Na2SO4), filtered and concentrated. The residue is purified by silica gel column chromatography (Hex/EtOAc, 1:0→95:5) to afford 5.68 g of the title compound as a yellow oil: ESI-MS: 183.1 [M+H]+; TLC: Rf=0.32 (Hex/EtOAc, 9:1).

Provenance & Evidence