Water → HCID 86598204, compound

HRID 2217219Notes

Reaction equation

[NH2:1][C:2]1[C:3]([C:19]([NH2:21])=[O:20])=[N:4][C:5]([C:9]2[CH:14]=[CH:13][C:12](=[O:15])[N:11]([CH:16]([CH3:18])[CH3:17])[CH:10]=2)=[CH:6][N+:7]=1[O-].P(Cl)(Cl)([Cl:24])=O.O>CN(C=O)C>[NH2:1][C:2]1[C:3]([C:19]([NH2:21])=[O:20])=[N:4][C:5]([C:9]2[CH:14]=[CH:13][C:12](=[O:15])[N:11]([CH:16]([CH3:18])[CH3:17])[CH:10]=2)=[C:6]([Cl:24])[N:7]=1

Participants

Conditions

Temperature: -30 °C

Procedure

3-Amino-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridyl)-2-pyrazinecarboxamide 4-oxide (8 g) was dissolved in DMF (80 ml). The solution was cooled to −30° C. To the cooled solution was added phosphoryl chloride (12.7 g) dropwise at −30˜−40° C. After addition of phosphoryl chloride, the temperature of the reaction mixture was raised to −10˜−5° C. The mixture was stirred at −10˜−5° C. for 1 hour. To the reaction mixture was added water (400 ml). The suspension was stirred at 30-35° C. for 15 hours. The pH of the suspension was adjusted to 4.5. The suspension was cooled to 0-5° C. and stirred at the same temperature for 2 hours. The precipitate was collected by filtration and washed with water, and dried in vacuo at 40-50° C., to give 3-amino-5-chloro-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridyl)-2-pyrazinecarboxamide (7.1 g).

Workup

temperaturethe temperature of the reaction mixture was raised to −10˜−5° C
stirringThe suspension was stirred at 30-35° C. for 15 hours
temperatureThe suspension was cooled to 0-5° C.
stirringstirred at the same temperature for 2 hours
filtrationThe precipitate was collected by filtration
washwashed with water
customdried in vacuo at 40-50° C.

Sources & evidence

ORD record: ord-801a7b05039a4540bd4daaae8be52c96
Source dataset: uspto-grants-2008_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07407961B2

Reaction notes

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