Hydrogen Peroxide → {3-[8-Chloro-1-(2-phenylquinolin-7-yl)imidazo[1,5-a]pyrazin-3-yl]cyclobutyl}methanol

HRID 1163173Notes

Reaction equation

HRID 1163173 reaction equation
[Cl:1][C:2]1[C:3]2[N:4]([C:8]([CH:27]3[CH2:30][C:29](=[CH2:31])[CH2:28]3)=[N:9][C:10]=2[C:11]2[CH:20]=[C:19]3[C:14]([CH:15]=[CH:16][C:17]([C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=4)=[N:18]3)=[CH:13][CH:12]=2)[CH:5]=[CH:6][N:7]=1.B1C2CCCC1CCC2.[OH-:41].[Na+].OO>C1COCC1.C(Cl)Cl>[Cl:1][C:2]1[C:3]2[N:4]([C:8]([CH:27]3[CH2:30][CH:29]([CH2:31][OH:41])[CH2:28]3)=[N:9][C:10]=2[C:11]2[CH:20]=[C:19]3[C:14]([CH:15]=[CH:16][C:17]([C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=4)=[N:18]3)=[CH:13][CH:12]=2)[CH:5]=[CH:6][N:7]=1

Participants

7

Reactant 4

HCID 784Hydrogen PeroxideHCID 14798Sodium HydroxideHCID 789669-Borabicyclo(3.3.1)nonaneHCID 536290387-(8-Chloro-3-(3-methylenecyclobutyl)imidazo[1,5-a]pyrazin-1-yl)-2-phenylquinoline

Product 1

HCID 57681056{3-[8-Chloro-1-(2-phenylquinolin-7-yl)imidazo[1,5-a]pyrazin-3-yl]cyclobutyl}methanol

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 7-[8-chloro-3-(3-methylenecyclobutyl)-imidazo[1,5-a]pyrazin-1-yl]-2-phenylquinoline (338 mg, 0.8 mmol) in dry THF (5 mL) was added 9-BBN (2.4 mL, 1.2 mmol, 0.5M in THF) dropwise at 0° C. under nitrogen atmosphere. The temperature was slowly warmed to rt overnight. The mixture was cooled to 0° C., and 3 mL 1N aq. NaOH and 0.6 mL 30% aq. H2O2 were added, the resulting mixture was stirred at 0° C. for 10 min, then rt for 30 min. The mixture was diluted with methylene chloride (30 mL), washed with brine (2×20 mL), and dried over anhydrous sodium sulfate. The filtrate was concentrated under reduced pressure, and the crude material was purified by silica gel column chromatography (eluting with hexanes:EtOAc=50:50→100% ethyl acetate), to obtain the title compound as a yellow solid, a mixture of cis and trans isomers in the ratio of 5:1; MS (ES+): m/z 441/443 (3/1) [MH+]; 1H NMR (CDCl3, 400 MHz) δ 2.44-2.64 (m, 6H), 3.65-3.76 (m, 3H), 7.31, 7.33 (2×d, J=5.0 Hz, 1H, 1:5 ratio), 7.39-7.57 (m, 4H), 7.86-7.98 (m, 3H), 8.18 (m, 2H), 8.26 (d, J=8.6 Hz, 1H), 8.51, 8.53 (2×s, 1H, 5:1 ratio).

Workup

  1. temperatureThe mixture was cooled to 0° C.
  2. waitrt for 30 min
  3. washwashed with brine (2×20 mL)
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationThe filtrate was concentrated under reduced pressure
  6. customthe crude material was purified by silica gel column chromatography (eluting with hexanes:EtOAc=50:50→100% ethyl acetate)

Sources & evidence

ORD record
ord-ade1bee0f1544a55b44db8a69636bb42
Source dataset
uspto-grants-2010_10
Patent number
US07820662B2

Reaction notes

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