Carbon Dioxide → HCID 66673079, compound

Participants

Reaction Steps

3.32 ml of 1.59M n-butyllithium-hexane solution was added dropwise for 5 minutes at −78° C. into a mixture of 1.82 g of 4-azepane-1-yl-2-(4-chloro-2,5-difluorophenyl)thieno[3,2-d]pyrimidine and 40 ml of THF and stirred for 15 minutes. Approximately 50 g of crushed dry ice was added to the reaction mixture and the temperature subsequently raised to room temperature. 50 ml of 10% citric acid solution was added to the reaction mixture and extracted with EtOAc. After the organic layer washed with a saturated saline solution and dried over anhydrous magnesium sulfate, the solvent was removed under reduced pressure. The obtained residue was purified by silica gel column chromatography (chloroform-MeOH) to give a foam-like substance. The foam-like substance was recrystallized from THF-acetonitrile to give 288 g of 4-azepane-1-yl-2-(4-chloro-2,5-difluorophenyl)thieno[3,2-d]pyrimidine-6-carboxylic acid.

Provenance & Evidence