Potassium Carbonate → HCID 67975593、化合物

HRID 2046236ノート

反応式

HRID 2046236 の反応式
[CH2:1]([O:3][C:4]([C:6]1[C:15](I)=[C:9]2[C:10](=[O:14])[NH:11][CH2:12][CH2:13][N:8]2[N:7]=1)=[O:5])[CH3:2].[CH3:17]B(O)O.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(C(C)C)=CC(C(C)C)=CC=2C(C)C)CCCCC1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C([O-])([O-])=O.[Na+].[Na+].C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH2:1]([O:3][C:4]([C:6]1[C:15]([CH3:17])=[C:9]2[C:10](=[O:14])[NH:11][CH2:12][CH2:13][N:8]2[N:7]=1)=[O:5])[CH3:2]

参加物

8

反応物 4

HCID 11430Potassium CarbonateHCID 139377Methylboronic AcidHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 679916203-Iodo-4-oxo-4,5,6,7-tetrahydro-pyrazolo[1,5-a]pyrazine-2-carboxylic acid ethyl ester

生成物 1

HCID 67975593HCID 67975593、化合物収率 58.7%

試薬・触媒・溶媒 3

HCID 167845palladium(II) acetate触媒HCID 1140Toluene溶媒HCID 10340Sodium Carbonate溶媒

反応条件

温度
90 °C

実験手順

Palladium (II) acetate (38 mg, 0.17 mmol) was added to a solution of 3-iodo-4-oxo-4,5,6,7-tetrahydro-pyrazolo[1,5-a]pyrazine-2-carboxylic acid ethyl ester (0.56 g 1.68 mmol), methylboronic acid (0.75 g, 12.6 mmol), 2-dicyclohexylphosphino-2′,4′,6′-triiso-propyl-1,1′-biphenyl (0.16 mg, 0.34 mmol) and potassium carbonate (0.69 g, 5.0 mmol) in toluene (15 mL) under nitrogen and the mixture was heated at 90° C. for 16 hours. Then the mixture was heated at 120° C. for 4 hours more. The mixture was diluted with a saturated Na2CO3 solution and extracted with DCM. The organic layer was separated, dried (MgSO4), filtered and the solvent evaporated in vacuo. The crude product was purified by flash column chromatography (silica; MeOH in DCM 0/100 to 10/90). The desired fractions were collected and the solvents evaporated in vacuo to yield 3-methyl-4-oxo-4,5,6,7-tetrahydro-pyrazolo[1,5-a]pyrazine-2-carboxylic acid ethyl ester (0.22 g, 58% yield).

後処理

  1. temperatureThen the mixture was heated at 120° C. for 4 hours more
  2. extractionextracted with DCM
  3. customThe organic layer was separated
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. customthe solvent evaporated in vacuo
  7. customThe crude product was purified by flash column chromatography (silica; MeOH in DCM 0/100 to 10/90)
  8. customThe desired fractions were collected
  9. customthe solvents evaporated in vacuo

出典と根拠

ORDレコード
ord-beb72d1493d945f8a007fe14f4cab420
出典データセット
uspto-grants-2013_11
特許番号
US08592422B2

反応ノート

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