Lithium Hydroxide → 6-Tert-butyl-8-fluoro-2-[4-[5-[[5-(3-hydroxyazetidin-1-yl)-2-pyridyl]amino]-1-methyl-6-oxo-3-pyridyl]-3-(hydroxymethyl)-2-pyridyl]phthalazin-1-one

HRID 407773Notes

Reaction equation

HRID 407773 reaction equation
C([O:4][CH2:5][C:6]1[C:7]([N:32]2[N:41]=[CH:40][C:39]3[C:34](=[C:35]([F:46])[CH:36]=[C:37]([C:42]([CH3:45])([CH3:44])[CH3:43])[CH:38]=3)[C:33]2=[O:47])=[N:8][CH:9]=[CH:10][C:11]=1[C:12]1[CH:17]=[C:16]([NH:18][C:19]2[CH:24]=[CH:23][C:22]([N:25]3[CH2:28][CH:27]([OH:29])[CH2:26]3)=[CH:21][N:20]=2)[C:15](=[O:30])[N:14]([CH3:31])[CH:13]=1)(=O)C.[OH-].[Li+]>C(O)(C)C.C1COCC1.O>[C:42]([C:37]1[CH:38]=[C:39]2[C:34](=[C:35]([F:46])[CH:36]=1)[C:33](=[O:47])[N:32]([C:7]1[C:6]([CH2:5][OH:4])=[C:11]([C:12]3[CH:17]=[C:16]([NH:18][C:19]4[CH:24]=[CH:23][C:22]([N:25]5[CH2:28][CH:27]([OH:29])[CH2:26]5)=[CH:21][N:20]=4)[C:15](=[O:30])[N:14]([CH3:31])[CH:13]=3)[CH:10]=[CH:9][N:8]=1)[N:41]=[CH:40]2)([CH3:45])([CH3:43])[CH3:44]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 86684036(2-(6-tert-Butyl-8-fluoro-1-oxophthalazin-2(1H)-yl)-4-(5-(5-(3-hydroxyazetidin-1-yl)pyridin-2-ylamino)-1-methyl-6-oxo-1,6-dihydropyridin-3-yl)pyridin-3-yl)methyl Acetate

Product 1

HCID 866840376-Tert-butyl-8-fluoro-2-[4-[5-[[5-(3-hydroxyazetidin-1-yl)-2-pyridyl]amino]-1-methyl-6-oxo-3-pyridyl]-3-(hydroxymethyl)-2-pyridyl]phthalazin-1-oneYield 31%

Reagents, catalysts & solvents 1

HCID 22722550Tetrahydrofuran water isopropanolSolvent

Procedure

A mixture of 147d (140 mg, 0.22 mmol) and lithium hydroxide (132 mg, 5.5 mmol) in i-propanol/THF/water (2:2:1, 10 mL) was stirred at room temperature for 1 hour. The mixture was concentrated under reduced pressure and diluted with water (10 mL). The resulting mixture was extracted with dichloromethane three times. The combined organic layer was concentrated under reduced pressure and the resulting residue was purified by reverse-phase prep-HPLC to afford 147 (40 mg, 31%) as a yellow solid. MS-ESI: [M+H]+ 598.2. 1H NMR (500 MHz, DMSO-d6) δ 8.57-8.53 (m, 3H), 8.32 (s, 1H), 7.90 (s, 1H), 7.77 (d, J=13.0 Hz, 1H), 7.51-7.49 (m, 2H), 7.43 (s, 1H), 7.19 (d, J=8.5 Hz, 1H), 6.88 (dd, J=3.0, 8.5 Hz, 1H), 5.57-5.56 (m, 1H), 4.89-4.87 (m, 1H), 4.55-4.52 (m, 1H), 4.43-4.41 (m, 2H), 4.05-4.02 (m, 2H), 3.60 (s, 3H), 3.45-3.42 (m, 2H), 1.39 (s, 9H).

Workup

  1. concentrationThe mixture was concentrated under reduced pressure
  2. additiondiluted with water (10 mL)
  3. extractionThe resulting mixture was extracted with dichloromethane three times
  4. concentrationThe combined organic layer was concentrated under reduced pressure
  5. customthe resulting residue was purified by reverse-phase prep-HPLC

Sources & evidence

ORD record
ord-8f808e3a1d8e4b08ae28b69f90970a4b
Source dataset
uspto-grants-2014_06
Patent number
US08754077B2

Reaction notes

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