Water → 2-(pyridin-4-ylamino)-6-(3,5-dimethoxyphenyl)-8-ethyl-8H-pyrido[2,3-d]pyrimidin-7-one

HRID 2184179Notes

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][N:5]=[CH:4][CH:3]=1.[NH2-].[Li+].CS[C:12]1[N:13]=[CH:14][C:15]2[CH:21]=[C:20]([C:22]3[CH:27]=[C:26]([O:28][CH3:29])[CH:25]=[C:24]([O:30][CH3:31])[CH:23]=3)[C:19](=[O:32])[N:18]([CH2:33][CH3:34])[C:16]=2[N:17]=1.O>O1CCCC1>[N:5]1[CH:6]=[CH:7][C:2]([NH:1][C:12]2[N:13]=[CH:14][C:15]3[CH:21]=[C:20]([C:22]4[CH:23]=[C:24]([O:30][CH3:31])[CH:25]=[C:26]([O:28][CH3:29])[CH:27]=4)[C:19](=[O:32])[N:18]([CH2:33][CH3:34])[C:16]=3[N:17]=2)=[CH:3][CH:4]=1

Participants

Conditions

Temperature: 50 °C

Procedure

To a 100-mL, three-neck, round bottom flask were added 294.0 mg (3.124 mM) of 4-aminopyridine, 238.8 mg (10.40 mM) of lithium amide, and 15 mL of tetrahydrofuran. The reaction mixture was heated to 50° C. for 1 hour. A solution of 998 mg (2.792 mM) of 2-(methylsulfanyl)-6-(3,5-dimethoxyphenyl)-8-ethyl-8H-pyrido[2,3-d]pyrimidin-7-one in 25 mL of tetrahydrofuran was added in one portion. The reaction mixture was heated at reflux for 24 hours. The reaction mixture was cooled to 50° C. and diluted by dropwise addition of 25 mL of water. The solid precipitate was collected by filtration and dried in a vacuum oven at 45° C. for 12 hours to provide 93.6% yield of the filtered compound, mp 305-307° C. Mass Spec (APCI) 403.9 m/z. HPLC established the product was 98.5% pure.

Workup

temperatureThe reaction mixture was heated
temperatureat reflux for 24 hours
temperatureThe reaction mixture was cooled to 50° C.
filtrationThe solid precipitate was collected by filtration
customdried in a vacuum oven at 45° C. for 12 hours

Sources & evidence

ORD record: ord-2350b7c9483048139303564cdb969704
Source dataset: uspto-grants-2005_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06900316B2

Reaction notes

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