HCID 178470277, compound → HCID 178489519, compound

HRID 1801883Notes

Reaction equation

HRID 1801883 reaction equation
[NH:1]1[CH:5]=[CH:4][C:3]([NH:6][C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]=[C:9]([C:17]([O:19]CC)=O)[N:8]=2)=[N:2]1.[CH3:22][O:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=1[Mg]Br>C1COCC1>[NH:1]1[CH:5]=[CH:4][C:3]([NH:6][C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]=[C:9]([C:17]([C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][C:24]=3[O:23][CH3:22])=[O:19])[N:8]=2)=[N:2]1

Participants

4

Reactant 2

HCID 178470277HCID 178470277, compoundHCID 178489560HCID 178489560, compound

Product 1

HCID 178489519HCID 178489519, compoundYield 17.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-40 °C

Procedure

To a suspension of ethyl 4-(1H-pyrazol-3-ylamino)quinazoline-2-carboxylate (0.110 g, 0.39 mmol) in THF (5 mL) under argon at −40° C. was added (2-methoxyphenyl)magnesium bromide (0.5 M solution in THF; 2.32 mL, 1.16 mmol). The mixture was stirred at −40° C. for 3 h and quenched with 0.5 N HCl (10 mL). The organic layer was separated. The aqueous layer was washed with 10% MeOH/CH2Cl2 (50 mL×2). The combined organic layers were washed with brine (25 mL), dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified on preparative HPLC (Phenomenex phenylhexyl reverse phase column, eluted with gradient of solvent B=0.05% HOAc/CH3CN and solvent A=0.05% HOAc/H2O) to afford (4-(1H-pyrazol-3-ylamino)quinazolin-2-yl)(2-methoxyphenyl)methanone as a yellow solid (0.023 g, 17%). 1H NMR (300 MHz, DMSO-d6) δ 3.50 (s, 3H), 6.58 (s, 1H), 7.15 (m, 2H), 7.70-7.50 (m, 4H), 7.88 (m, 2H), 8.75 (d, 1H), 10.68 (s, 1H), 12.42 (s, 1H); LC-MS (ESI) m/z 346 (M+H)+.

Workup

  1. customquenched with 0.5 N HCl (10 mL)
  2. customThe organic layer was separated
  3. washThe aqueous layer was washed with 10% MeOH/CH2Cl2 (50 mL×2)
  4. washThe combined organic layers were washed with brine (25 mL)
  5. dry with materialdried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified on preparative HPLC (Phenomenex phenylhexyl reverse phase column
  9. washeluted with gradient of solvent B=0.05% HOAc/CH3CN and solvent A=0.05% HOAc/H2O)

Sources & evidence

ORD record
ord-fd1823e835cf4b0690672fd83b692c51
Source dataset
uspto-grants-2013_01
Patent number
US08349851B2

Reaction notes

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