Sodium Bicarbonate → HCID 44517635, compound

Participants

Reaction Steps

A solution of 1.02 kg of N′-[[2,4-bis-(2,4-difluoro-phenoxy)-pyrimidin-5-yl]-((R)-2-methanesulfonyl-1-methyl-ethylamino)-methylene]-hydrazinecarboxylic acid tert-butyl ester in toluene (6-8 l) and conc HCl. (500 ml) was stirred at room temperature overnight. The reaction mixture was diluted with iso-propyl acetate (3.5 L) and a saturated aqueous sodium bicarbonate solution was added. The resulting solid precipitate was collected by filtration, washed with aqueous sodium bicarbonate, water, then with methyl t-butyl ether, and dried under vacuum. The material was recrystallized from isobutanol to give 455 g of [6-(2,4-difluoro-phenoxy)-1H-pyrazolo[3,4-d]pyrimidin-3-yl]-((R)-2-methanesulfonyl-1-methyl-ethyl)-amine. Mp=177.7-178.8° C., MS(M+H)=384.

Provenance & Evidence