Water → HCID 86598206, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 3-amino-6-(1-methyl-6-oxo-1,6-dihydro-3-pyridyl)-2-pyrazinecarboxamide 4-oxide (1.0 g) in DMF was added phosphoric trichloride (1.07 ml) at −40° C. for 20 minutes. This reaction mixture was warmed to −10° C. and stirred for 1 hour. To this solution was added water (40 ml) and stirred at 40° C. for 14 hours. The pH of the resulting suspension was adjusted to 4.5 with 30% The pH of the aqueous mixture was adjusted to 6-7 with 12% aq. NaOH. The precipitate was collected by filtration and washed with water to give 3-amino-5-chloro-6-(1-methyl-6-oxo-1,6-dihydro-3-pyridyl)-2-pyrazinecarboxamide (263 mg) as a yellow powder.

Provenance & Evidence