3,4-dihydro-2H-pyran → HCID 86636416, compound

HRID 1664325Notes

Reaction equation

HRID 1664325 reaction equation
[Br:1][C:2]1[CH:18]=[CH:17][C:5]([O:6][C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][C:8]=2[CH:15]=[O:16])=[CH:4][C:3]=1[CH2:19][OH:20].[O:21]1[CH:26]=[CH:25][CH2:24][CH2:23][CH2:22]1.C(=O)([O-])[O-].[Na+].[Na+].O.C(Cl)(Cl)Cl>ClCCl.CC1(C)[C@]2(CS(O)(=O)=O)C(C[C@H]1CC2)=O>[Br:1][C:2]1[CH:18]=[CH:17][C:5]([O:6][C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][C:8]=2[CH:15]=[O:16])=[CH:4][C:3]=1[CH2:19][O:20][CH:22]1[CH2:23][CH2:24][CH2:25][CH2:26][O:21]1

Participants

7

Reactant 4

HCID 80803,4-dihydro-2H-pyranHCID 10340Sodium CarbonateHCID 22418719Chloroform waterHCID 86636415HCID 86636415, compound

Product 1

HCID 86636416HCID 86636416, compoundYield 88%

Reagents, catalysts & solvents 2

HCID 65617D-Camphorsulfonic AcidCatalystHCID 6344DichloromethaneSolvent

Procedure

A mixture of 4-[4-bromo-3-(hydroxymethyl)phenoxy]-3-formylbenzonitrile (25.5 g, 76.8 mmol), 3,4-dihydro-2H-pyran (10.4 mL, 115 mmol), and dl-10-camphorsulfonic acid (356 mg, 2 mol %) in dichloromethane (300 mL) was stirred at room temperature for 2 h. Sodium carbonate (3 g) was added, and the mixture was poured into water/chloroform. The organic layer was washed with brine and dried on anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was purified by silica gel column (85:15 hexane/ethyl acetate) to give 4-[4-bromo-3-(2-tetrahydropyranyloxymethyl)phenoxy]-3-formylbenzonitrile (28.0 g, 88%).

Workup

  1. washThe organic layer was washed with brine
  2. dry with materialdried on anhydrous sodium sulfate
  3. customThe solvent was removed under reduced pressure
  4. customthe residue was purified by silica gel column (85:15 hexane/ethyl acetate)

Sources & evidence

ORD record
ord-145c48b08fd9459899c1af09569b8df9
Source dataset
uspto-grants-2011_10
Patent number
US08039450B2

Reaction notes

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