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Potassium Carbonate → 4-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

HRID 1479951
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HRID 1479951 반응식
[CH2:1]([C:8]1[N:9]=[N:10][C:11](Cl)=[C:12]([CH3:15])[C:13]=1[CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CC1(C)C(C)(C)OB([C:25]2[CH2:30][CH2:29][N:28]([C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:27][CH:26]=2)O1.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:34]([O:33][C:31]([N:28]1[CH2:27][CH:26]=[C:25]([C:11]2[N:10]=[N:9][C:8]([CH2:1][C:2]3[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=3)=[C:13]([CH3:14])[C:12]=2[CH3:15])[CH2:30][CH2:29]1)=[O:32])([CH3:37])([CH3:35])[CH3:36]
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참가 물질

6

반응물 3

HCID 11430Potassium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 591914873-Benzyl-6-chloro-4,5-dimethylpyridazine

생성물 1

HCID 591916464-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester수율 77%

시약·촉매·용매 2

HCID 178418397
HCID 178418397, 화합물
촉매
HCID 6228Dimethylformamide용매

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온도
100 °C

실험 절차

To a solution of 3-benzyl-6-chloro-4,5-dimethylpyridazine (800 mg, 3.44 mmol) in 20 mL DMF is added tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (1.3 g, 4.1 mmol), followed with potassium carbonate (1.43 g, 10.3 mmol) and Pd(PPh3)4 (397 mg, 0.344 mmol) in a round bottom flask. The vial is evacuated and flushed with nitrogen. The reaction mixture is heated to 100° C. for 16 h. The mixture is filtered through Celite and the filtrate is concentrated to afford the crude material. The mixture is purified by flash chromatography on silica gel, eluting with 3%-15% MeOH: DCM. Fractions containing the desired product are combined and concentrated to afford a brown solid (1.0 g, 77%).

후처리

  1. customThe vial is evacuated
  2. customflushed with nitrogen
  3. filtrationThe mixture is filtered through Celite
  4. concentrationthe filtrate is concentrated
  5. customto afford the crude material
  6. customThe mixture is purified by flash chromatography on silica gel
  7. washeluting with 3%-15% MeOH
  8. additionFractions containing the desired product
  9. concentrationconcentrated

출처 및 근거

ORD 기록
ord-11c0d98ecf3049108b8422e120f91de6
출처 데이터셋
uspto-grants-2016_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US09409871B2

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