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

HRID 1185105
Notes
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Reaction equation

HRID 1185105 reaction equation
C([O:4][CH2:5][C:6]1[C:7]([N:27]2[N:36]=[CH:35][C:34]3[C:29](=[C:30]([F:41])[CH:31]=[C:32]([C:37]([CH3:40])([CH3:39])[CH3:38])[CH:33]=3)[C:28]2=[O:42])=[N:8][CH:9]=[CH:10][C:11]=1[C:12]1[CH:17]=[C:16]([NH:18][C:19]2[O:20][C:21]([CH3:24])=[CH:22][N:23]=2)[C:15](=[O:25])[N:14]([CH3:26])[CH:13]=1)(=O)C.[OH-].[Li+]>C(O)(C)C.C1COCC1.O>[C:37]([C:32]1[CH:33]=[C:34]2[C:29](=[C:30]([F:41])[CH:31]=1)[C:28](=[O:42])[N:27]([C:7]1[C:6]([CH2:5][OH:4])=[C:11]([C:12]3[CH:17]=[C:16]([NH:18][C:19]4[O:20][C:21]([CH3:24])=[CH:22][N:23]=4)[C:15](=[O:25])[N:14]([CH3:26])[CH:13]=3)[CH:10]=[CH:9][N:8]=1)[N:36]=[CH:35]2)([CH3:40])([CH3:38])[CH3:39]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 86683967(2-(6-tert-Butyl-8-fluoro-1-oxophthalazin-2(1H)-yl)-4-(1-methyl-5-(5-methyloxazol-2-ylamino)-6-oxo-1,6-dihydropyridin-3-yl)pyridin-3-yl)methyl Acetate

Product 1

HCID 866839686-Tert-butyl-8-fluoro-2-[3-(hydroxymethyl)-4-[1-methyl-5-[(5-methyloxazol-2-yl)amino]-6-oxo-3-pyridyl]-2-pyridyl]phthalazin-1-oneYield 49%

Reagents, catalysts & solvents 1

HCID 22722550
Tetrahydrofuran water isopropanol
Solvent

Conditions

Temperature
35 °C

Procedure

A mixture of 125b (114 mg, 0.20 mmol) and lithium hydroxide (120 mg, 5.0 mmol) in i-propanol/THF/water (2:2:1, 10 mL) was stirred at 35° C. for 30 mins. The mixture was concentrated under reduced pressure and the residue was diluted with water (5 mL). The resulting mixture was extracted with dichloromethane three times. The combined organic layer was then concentrated under reduced pressure and the resulting residue was purified by reverse-phase prep-HPLC to afford 125 (52 mg, 49%). MS-ESI: [M+H]+ 530.9. 1H NMR (500 MHz, DMSO-d6) δ 9.25 (s, 1H), 8.57 (d, J=5.0 Hz, 1H), 8.53 (d, J=3.0 Hz, 1H), 8.25 (d, J=2.5 Hz, 1H), 7.90 (d, J=1.0 Hz, 1H), 7.78 (dd, J=1.0, 13.0 Hz, 1H), 7.61 (d, J=2.0 Hz, 1H), 7.50 (d, J=5.0 Hz, 1H), 6.64 (d, J=1.5 Hz, 1H), 4.92 (bs, 1H), 4.40 (d, J=7.0 Hz, 2H), 3.60 (s, 3H), 2.22 (s, 3H), 1.39 (s, 9H).

Workup

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

Sources & evidence

ORD record
ord-867d472c8a60430480a991b936f993ec
Source dataset
uspto-grants-2014_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08669251B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes