Potassium Phosphate, Tribasic → (2-(6-tert-Butyl-8-fluoro-1-oxophthalazin-2(1H)-yl)-4-(1-methyl-5-(5-methylisoxazol-3-ylamino)-6-oxo-1,6-dihydropyridazin-3-yl)pyridin-3-yl)methyl Acetate

HRID 407756Notes

Reaction equation

HRID 407756 reaction equation
Cl[C:2]1[CH:3]=[C:4]([NH:10][C:11]2[CH:15]=[C:14]([CH3:16])[O:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[N:7]=1.[C:17]([O:20][CH2:21][C:22]1[C:23]([N:37]2[N:46]=[CH:45][C:44]3[C:39](=[C:40]([F:51])[CH:41]=[C:42]([C:47]([CH3:50])([CH3:49])[CH3:48])[CH:43]=3)[C:38]2=[O:52])=[N:24][CH:25]=[CH:26][C:27]=1B1OC(C)(C)C(C)(C)O1)(=[O:19])[CH3:18].C([O-])(=O)C.[K+].[O-]P([O-])([O-])=O.[K+].[K+].[K+]>O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(#N)C>[C:17]([O:20][CH2:21][C:22]1[C:23]([N:37]2[N:46]=[CH:45][C:44]3[C:39](=[C:40]([F:51])[CH:41]=[C:42]([C:47]([CH3:49])([CH3:48])[CH3:50])[CH:43]=3)[C:38]2=[O:52])=[N:24][CH:25]=[CH:26][C:27]=1[C:2]1[CH:3]=[C:4]([NH:10][C:11]2[CH:15]=[C:14]([CH3:16])[O:13][N:12]=2)[C:5](=[O:9])[N:6]([CH3:8])[N:7]=1)(=[O:19])[CH3:18]

Participants

8

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 517044Potassium AcetateHCID 86683972(2-(6-tert-butyl-8-fluoro-1-oxophthalazin-2(1H)-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)methyl acetateHCID 866840236-Chloro-2-methyl-4-(5-methylisoxazol-3-ylamino)pyridazin-3(2H)-one

Product 1

HCID 86684024(2-(6-tert-Butyl-8-fluoro-1-oxophthalazin-2(1H)-yl)-4-(1-methyl-5-(5-methylisoxazol-3-ylamino)-6-oxo-1,6-dihydropyridazin-3-yl)pyridin-3-yl)methyl AcetateYield 32%

Reagents, catalysts & solvents 3

HCID 962WaterCatalystHCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 6342AcetonitrileSolvent

Conditions

Temperature
95 °C

Procedure

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 141a (288 mg, 1.2 mmol), 3-(acetoxymethyl)-2-(6-tert-butyl-8-fluoro-1-oxo-phthalazin-2(1H)-yl)pyridin-4-ylboronic acid 116c (1.49 g, 3.6 mmol), Pd(dppf)Cl2 (99 mg, 0.12 mmol), potassium acetate (235 mg, 2.4 mmol), K3PO4 (523 mg, 2.4 mmol), acetonitrile (20 mL), and water (10 drops). After three cycles of vacuum/argon flush, the mixture was heated at 95° C. for 2 h. It was then filtered and the filtrate was concentrated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 1:1 ethyl acetate/petroleum ether to afford 141b (220 mg, 32%) as a yellow solid. MS-ESI: [M+H]+ 574.2

Workup

  1. customA 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
  2. customAfter three cycles of vacuum/argon flush
  3. filtrationIt was then filtered
  4. concentrationthe filtrate was concentrated under reduced pressure
  5. customThe residue was purified by silica-gel column chromatography
  6. washeluting with 1:1 ethyl acetate/petroleum ether

Sources & evidence

ORD record
ord-4f8e2ef9dd85456e97eea1b8f133190a
Source dataset
uspto-grants-2014_06
Patent number
US08754077B2

Reaction notes

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