Methyl morpholine oxide → 5-Chloro-2-methyl-4-oxo-4H-chromene-8-carbaldehyde

Participants

Reaction Steps

210 mg (0.57 mmol) of 5-chloro-8-(dibromomethyl)-2-methyl-4H-chromen-4-one are heated with 147 mg (1.2 mmol) of N-methylmorpholine N-oxide with the addition of molecular sieves in 15 ml of acetonitrile under reflux overnight. After filtration through kieselguhr, the solvent is removed in vacuo and the residue is purified by preparative HPLC. 22 mg (17% of theory) of the title compound are obtained.

Provenance & Evidence