3,4-dihydro-2H-pyran → 1h-Indazole,5-bromo-3-(4-fluorophenyl)-1-(tetrahydro-2h-pyran-2-yl)-

HRID 1349636Notes

Reaction equation

HRID 1349636 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][N:6]=[C:5]2[C:11]1[CH:16]=[CH:15][C:14]([F:17])=[CH:13][CH:12]=1.[O:18]1[CH:23]=[CH:22][CH2:21][CH2:20][CH2:19]1.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>O1CCCC1>[Br:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[N:7]([CH:19]1[CH2:20][CH2:21][CH2:22][CH2:23][O:18]1)[N:6]=[C:5]2[C:11]1[CH:16]=[CH:15][C:14]([F:17])=[CH:13][CH:12]=1

Participants

5

Reactant 3

HCID 80803,4-dihydro-2H-pyranHCID 521998p-Toluenesulfonic acid monohydrateHCID 224802935-bromo-3-(4-fluorophenyl)-1H-indazole

Product 1

HCID 224796801h-Indazole,5-bromo-3-(4-fluorophenyl)-1-(tetrahydro-2h-pyran-2-yl)-Yield 82.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 5-bromo-3-(4-fluorophenyl)-1H-indazole (8.00 g, 27.48 mmol) in dried tetrahydrofuran (80 mL) under nitrogen at ambient temperature was added 3,4-dihydro-2H-pyran (5.78 g, 68.7 mmol) and p-toluenesulfonic acid monohydrate (1.00 g, 5.26 mmol). The reaction mixture was stirred at room temperature for 24 hours. It was quenched with dichloromethane and washed with 5% sodium carbonate and brine. The dichloromethane layer was dried over magnesium sulfate and concentrated. Crystallization from diethyl ether and hexane provided the title compound (8.47 g, 82% yield). 1H NMR (CDCl3) δ 8.07 (t, 1H), 7.86–7.91 (m, 2H), 7.47–7.55 (m, 2H), 7.16–7.26 (m, 2H), 5.74 (dd, 1H), 4.05 (m, 1H), 3.76 (m, 1H), 2.60 (m, 1H), 2.08–2.21 (m, 2H), 1.66–1.83 (m, 3H); ES-MS (m/z) 377 [M+3]+, 375 [M+1]+.

Workup

  1. customIt was quenched with dichloromethane
  2. washwashed with 5% sodium carbonate and brine
  3. dry with materialThe dichloromethane layer was dried over magnesium sulfate
  4. concentrationconcentrated
  5. customCrystallization from diethyl ether and hexane

Sources & evidence

ORD record
ord-2e1df8f3191245088d2ed98dc3846a45
Source dataset
uspto-grants-2007_05
Patent number
US07211594B2

Reaction notes

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