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p-Toluenesulfonic acid → HCID 71238321, compound

HRID 2038721
Notes
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Reaction equation

HRID 2038721 reaction equation
[CH2:1]([C:3]1[CH:8]=[C:7]([O:9][CH3:10])[C:6]([F:11])=[CH:5][C:4]=1[C:12]1[CH:20]=[C:19]2[C:15]([C:16]([I:21])=[N:17][NH:18]2)=[CH:14][CH:13]=1)[CH3:2].CC1C=CC(S(O)(=O)=O)=CC=1.[O:33]1[CH:38]=[CH:37][CH2:36][CH2:35][CH2:34]1>C(Cl)Cl>[CH2:1]([C:3]1[CH:8]=[C:7]([O:9][CH3:10])[C:6]([F:11])=[CH:5][C:4]=1[C:12]1[CH:20]=[C:19]2[C:15]([C:16]([I:21])=[N:17][N:18]2[CH:34]2[CH2:35][CH2:36][CH2:37][CH2:38][O:33]2)=[CH:14][CH:13]=1)[CH3:2]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 6101p-Toluenesulfonic acidHCID 80803,4-dihydro-2H-pyranHCID 178436892HCID 178436892, compound

Product 1

HCID 71238321HCID 71238321, compoundYield 89%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

To a solution of 6-(2-ethyl-5-fluoro-4-methoxy-phenyl)-3-iodo-1H-indazole (Preparation 16, 1.94 g, 4.9 mmol) in DCM (10 mL) was added p-TsOH (187 mg, 982 μmol) and the mixture was cooled to 0° C. 3,4-Dihydro-2H-pyran (660 μL, 7.4 mmol) was added dropwise to the solution and the reaction was stirred at room temperature overnight. The reaction mixture was diluted with DCM (5 mL) and washed with saturated sodium hydrogen carbonate aqueous solution (20 mL). The organic layer was dried over MgSO4 and concentrated in vacuo to yield a black oil. The residue was purified by column chromatography (Biotage SNAP 10 g) eluting with a gradient of 20% EtOAc in heptane to give the title compound as a colourless oil (2.09 g) in an 89% yield.

Workup

  1. washwashed with saturated sodium hydrogen carbonate aqueous solution (20 mL)
  2. dry with materialThe organic layer was dried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customto yield a black oil
  5. customThe residue was purified by column chromatography (Biotage SNAP 10 g)
  6. washeluting with a gradient of 20% EtOAc in heptane

Sources & evidence

ORD record
ord-798361547bc94640a073a9f12f7d35cc
Source dataset
uspto-grants-2013_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08575336B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes