Ethanol → HCID 18704698, compound

To 60 ml of ethanol in a 250 ml round-bottom flask was added 25 grams of 4-pyridinecarboxylic acid hydrazide and 58 grams of 1-bromo-2-fluoroethane, to prepare a reaction mixture. After stirring the reaction mixture at room temperature for 15 minutes, a solution of 24 grams of potassium hydroxide in 60 ml of water was added dropwise to the reaction mixture. The resulting reaction mixture was heated to reflux for 3 hours. The reaction mixture was then allowed to cool to room temperature. To the cooled reaction mixture was added 100 ml of water and 200 ml of dichloromethane, to prepare a mixture with an aqueous layer and an organic layer. The organic layer was separated and extracted to leave an oil upon evaporation of the solvent. The oil was purified by column chromatography on silica gel using dichloromethane as the eluant, to produce 12 grams of 4-(2-fluoroethyl)-5,6-dihydro-2-(4-pyridinyl)-4H-1,3,4-oxadiazine as an oil.

1. customto prepare a reaction mixture
2. customThe resulting reaction mixture
3. temperaturewas heated
4. temperatureto reflux for 3 hours
5. temperatureto cool to room temperature
6. customTo the cooled reaction mixture
7. customto prepare a mixture with an aqueous layer
8. customThe organic layer was separated
9. extractionextracted
10. customto leave an oil
11. customupon evaporation of the solvent
12. customThe oil was purified by column chromatography on silica gel

ORD record

ord-d70c8379898148e58f19a8ca9e820ffe

Source dataset

uspto-grants-2000_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06083942