p-Toluenesulfonic acid → HCID 86686190, compound

HRID 1406685Notes

Reaction equation

HRID 1406685 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[S:17][CH2:18][CH2:19][OH:20])=[N:9][N:10]=2)[CH:7]=1.CC1C=CC(S(O)(=O)=O)=CC=1.[O:32]1[CH:37]=[CH:36][CH2:35][CH2:34][CH2:33]1>C(Cl)Cl>[F:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[S:17][CH2:18][CH2:19][O:20][CH:33]3[CH2:34][CH2:35][CH2:36][CH2:37][O:32]3)=[N:9][N:10]=2)[CH:7]=1

Participants

5

Reactant 3

HCID 6101p-Toluenesulfonic acidHCID 80803,4-dihydro-2H-pyranHCID 86686191HCID 86686191, compound

Product 1

HCID 86686190HCID 86686190, compoundYield 74%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A solution of 2-[2-(6-fluoro-[1,2,4]triazolo[4,3-a]pyridin-3-yl)-phenylsulfanyl]-ethanol (400 mg, 1.38 mmol), 4-methylbenzenesulfonic acid (65 mg, 0.345 mmol) and 3,4-dihydro-2H-pyran (251 μL, 2.76 mmol) in DCM (5 mL) was stirred at RT under a nitrogen atmosphere for 36 h. The reaction mixture was diluted with DCM and extracted with sat. NaHCO3. The organic layer was dried over MgSO4, filtered and concentrated in vacuo. The residue was purified by FCC using MeOH in DCM (0 to 5%) to give the title compound as a pale yellow oil (381 mg, 74%). LCMS (Method 3): Rt 3.10 min, m/z 374 [MH+]. 1H NMR (400 MHz, CDCl3): 1.49 (6 H, m), 3.01-3.02 (2 H, m), 3.42-3.59 (2 H, m), 3.80-3.80 (2 H, m), 4.52 (1 H, m), 7.34-7.35 (2 H, m), 7.55-7.55 (2 H, m), 7.67-7.68 (2 H, m), 7.90 (1 H, dd, J 9.97 and 4.82).

Workup

  1. extractionextracted with sat. NaHCO3
  2. dry with materialThe organic layer was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by FCC

Sources & evidence

ORD record
ord-4652e7b1d6f64f488f996599471dacd6
Source dataset
uspto-grants-2014_12
Patent number
US08916708B2

Reaction notes

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