Lithium iodide → 2-(6-(Methyl(2,2,6,6-tetramethylpiperidin-4-yl)amino)pyridazin-3-yl)-5-(5-methyloxazol-2-yl)phenol

HRID 1027170Notes

Reaction equation

HRID 1027170 reaction equation
C[O:2][C:3]1[CH:8]=[C:7]([C:9]2[O:10][C:11]([CH3:14])=[CH:12][N:13]=2)[CH:6]=[CH:5][C:4]=1[C:15]1[N:20]=[N:19][C:18]([N:21]([CH3:32])[CH:22]2[CH2:27][C:26]([CH3:29])([CH3:28])[NH:25][C:24]([CH3:31])([CH3:30])[CH2:23]2)=[CH:17][CH:16]=1.[Li+].[I-]>N1C(C)=CC(C)=CC=1C.CO.CCOC(C)=O.O>[CH3:32][N:21]([CH:22]1[CH2:27][C:26]([CH3:29])([CH3:28])[NH:25][C:24]([CH3:31])([CH3:30])[CH2:23]1)[C:18]1[N:19]=[N:20][C:15]([C:4]2[CH:5]=[CH:6][C:7]([C:9]3[O:10][C:11]([CH3:14])=[CH:12][N:13]=3)=[CH:8][C:3]=2[OH:2])=[CH:16][CH:17]=1

Participants

7

Reactant 2

HCID 66321Lithium iodideHCID 867105626-(2-methoxy-4-(5-methyloxazol-2-yl)phenyl)-N-methyl-N-(2,2,6,6-tetramethylpiperidin-4-yl)pyridazin-3-amine

Product 1

HCID 1362530162-(6-(Methyl(2,2,6,6-tetramethylpiperidin-4-yl)amino)pyridazin-3-yl)-5-(5-methyloxazol-2-yl)phenolYield 48.4%

Reagents, catalysts & solvents 4

HCID 887MethanolSolventHCID 962WaterSolventHCID 79532,4,6-TrimethylpyridineSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
170 °C

Procedure

To a solution of 6-(2-methoxy-4-(5-methyloxazol-2-yl)phenyl)-N-methyl-N-(2,2,6,6-tetramethylpiperidin-4-yl)pyridazin-3-amine (106 mg, 0.24 mmol) in 2,4,6 collidine (8 mL, dried over MgSO4, and filtered), was added anhydrous LiI (292 mg, 2.18 mmol). The reaction was stirred at 170° C. for 4 h, then cooled and diluted with small amounts of MeOH and EtOAc (150 mL) and H2O (30 mL). The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The crude product was purified via HPLC to provide 2-(6-(methyl(2,2,6,6-tetramethylpiperidin-4-yl)amino)pyridazin-3-yl)-5-(5-methyloxazol-2-yl)phenol (49 mg). LCMS Rt=0.55 min (LCMS method Q); MS (M+1)=422.3. 1H NMR (400 MHz, METHANOL-d4) δ ppm 8.12 (d, J=9.9 Hz, 1H), 7.86 (d, J=8.8 Hz, 1H), 7.53 (dd, J=6.1, 1.8 Hz, 1H), 7.51 (s, 1H), 7.30 (d, J=10.1 Hz, 1H), 6.92 (d, J=1.0 Hz, 1H), 5.03-5.14 (m, 1H), 3.01 (s, 3H), 2.43 (d, J=1.2 Hz, 3H), 1.68 (dd, J=12.6, 3.5 Hz, 2H), 1.56 (t, J=12.3 Hz, 2H), 1.37 (s, 6H), 1.21 (s, 6H).

Workup

  1. temperaturecooled
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe crude product was purified via HPLC

Sources & evidence

ORD record
ord-43690465ac034d20a0a49f08377b3a97
Source dataset
uspto-grants-2014_05
Patent number
US08729263B2

Reaction notes

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