Acetone → HCID 15428311, compound

To a solution of 0.80 g of the ethyl imidazo[5,1-b]-thiazole-3-carboxylate prepared in Preparation 11 in 16 ml of methanol was added 400 mg of sodium borohydride, and the mixture was stirred at room temperature for 30 minutes. To the reaction solution was added dropwise 3 ml of acetone. The mixture was stirred for 30 minutes, and then concentrated to dryness under reduced pressure. To the residue were added 20 ml of methylene chloride and 20 ml of a saturated saline solution, and the mixture was stirred for 10 minutes. The organic layer was separated, and the aqueous layer was extracted with methylene chloride (20 ml×2). The combined organic layers were dried over anhydrous magnesium sulfate, and concentrated to dryness under reduced pressure to give 0.615 of the title compound as light brown crystals.

1. stirringThe mixture was stirred for 30 minutes
2. concentrationconcentrated to dryness under reduced pressure
3. additionTo the residue were added 20 ml of methylene chloride and 20 ml of a saturated saline solution
4. stirringthe mixture was stirred for 10 minutes
5. customThe organic layer was separated
6. extractionthe aqueous layer was extracted with methylene chloride (20 ml×2)
7. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
8. concentrationconcentrated to dryness under reduced pressure

ORD record

ord-9c70d7fedf55480ba0c141f5703f5973

Source dataset

uspto-grants-1997_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05663162