Ethyl 2-chloroacetoacetate → HCID 86717873, compound

Participants

Reaction Steps

3.2 g of 2-amino-5-fluoropyridin-3-ol (Example 11A; 25 mmol, 1 equivalent) were initially charged in 155 ml of ethanol, 1.5 g of powdered molecular sieve 3 Å and 20.6 g of ethyl 2-chloroacetoacetate (125 mmol, 5 equivalents) were added and the mixture was heated at reflux overnight. The reaction solution was concentrated and chromatographed (Biotage Isolera Four; SNAP Cartridge KP-Sil 50 g; cyclohexane/ethyl acetate gradient; then dichloromethane/methanol gradient). The crude product was partly dissolved in a little methanol, and tert-butyl methyl ether was added. The solid obtained was filtered off and rinsed with tert-butyl methyl ether. This gave 570 mg (10% of theory) of the title compound.

Provenance & Evidence