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Water → 9-(6,7-Dihydro-5H-cyclopentapyrazin-6-ylmethyl)-7,7-dimethyl-2-(pyrimidin-4-yl)-6,7,8,9-tetrahydro-pyrimido[1,2-alpha]pyrimidin-4-one

HRID 2375338
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HRID 2375338 반응식
[CH3:1][C:2]1([CH3:19])[CH2:18][N:6]2[C:7](=[O:17])[CH:8]=[C:9]([C:11]3[CH:16]=[CH:15][N:14]=[CH:13][N:12]=3)[N:10]=[C:5]2[NH:4][CH2:3]1.[H-].[Na+].[N:22]1[C:27]2[CH2:28][CH:29]([CH2:31]OS(C)(=O)=O)[CH2:30][C:26]=2[N:25]=[CH:24][CH:23]=1.O>CN(C)C=O>[N:22]1[C:27]2[CH2:28][CH:29]([CH2:31][N:4]3[C:5]4=[N:10][C:9]([C:11]5[CH:16]=[CH:15][N:14]=[CH:13][N:12]=5)=[CH:8][C:7](=[O:17])[N:6]4[CH2:18][C:2]([CH3:19])([CH3:1])[CH2:3]3)[CH2:30][C:26]=2[N:25]=[CH:24][CH:23]=1
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참가 물질

6

반응물 4

HCID 962WaterHCID 24758Sodium hydrideHCID 86615340methanesulfonic acid 6,7-dihydro-5H-cyclopentapyrazin-6-ylmethyl esterHCID 1360828947,7-Dimethyl-2-(pyrimidin-4-yl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one

생성물 1

HCID 179562929-(6,7-Dihydro-5H-cyclopentapyrazin-6-ylmethyl)-7,7-dimethyl-2-(pyrimidin-4-yl)-6,7,8,9-tetrahydro-pyrimido[1,2-alpha]pyrimidin-4-one
수율 10.6%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매2회

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온도
50 °C

실험 절차

A suspension of 0.5 g (1.94 mmol) of 7,7-dimethyl-2-(pyrimidin-4-yl)-6,7,8,9-tetrahydro-4H-pyrimido[1,2-a]pyrimidin-4-one in 10 ml of anhydrous dimethylformamide was treated with 155 mg (3.89 mmol) of sodium hydride (50% suspension in mineral oil) and the resulting mixture was stirred for 40 min at 50° C. 0.888 g (3.89 mmol) of methanesulfonic acid 6,7-dihydro-5H-cyclopentapyrazin-6-ylmethyl ester in 2 ml of anhydrous dimethylformamide was added and the reaction mixture stirred at room temperature for 18 h. The solution was treated with water and extracted with ethyl acetate. The organic phase was dried and evaporated to give crude product, which was purified by silica gel chromatography, eluting with dichloromethane/methanol in the proportions 100/1 to 95/5 to give 80 mg of pure product obtained in the form of free base which was transformed into the hydrochloride salt. Mp: 193-195° C.

후처리

  1. stirringthe reaction mixture stirred at room temperature for 18 h
  2. extractionextracted with ethyl acetate
  3. customThe organic phase was dried
  4. customevaporated
  5. customto give crude product, which
  6. customwas purified by silica gel chromatography
  7. washeluting with dichloromethane/methanol in the proportions 100/1 to 95/5

출처 및 근거

ORD 기록
ord-37b71de9c4c0471294caf0b1c03d2f1f
출처 데이터셋
uspto-grants-2008_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07465737B2

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