HCID 21941479, compound → 6,7-dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carbaldehyde

Participants

Reaction Steps

To the stirred solution of 2,3-dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-2-yl-methanol (2.08 g, 13.5 mmol) in 60 ml of CH3Cl was added 9.38 g of MnO2. Th suspension was refluxed for 2 hour under a nitrogen atmosphere. The reaction mixture was filtered through a pad of Celite. The filtrate was concentrated to give yellow oil. The product was purified by chromatography. 2.15 g of the product was obtained (78%).

Provenance & Evidence