Selenium Dioxide → HCID 12045063, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of the preceding diester 3 (step 2) (11.5 g, 34 mmol) and selenium dioxide (6.7 g, 60 mmol) in 50 ml of 1,4-dioxane is heated under reflux for 12 hours. After cooling to 20° C., the reaction mixture is filtered on Celite® and concentrated under reduced pressure. The residue is chromatographed on a silica column, eluting a 4/1 cyclohexane/ethyl acetate mixture so as to give 8.6 g (71%) of n-butyl 8-(2,2-dimethylpropionyloxy)-2-formylquinoline-7-carboxylate 4. White solid.

Provenance & Evidence