Sodium hydride → 6'-bromo-4-methoxyspiro[cyclohexane-1,2'-inden]-1'(3'H)-one

HRID 336563

Reaction equation

HRID 336563 reaction equation
[Br:1][C:2]1[CH:10]=[C:9]2[C:5]([CH2:6][CH2:7][C:8]2=[O:11])=[CH:4][CH:3]=1.Br[CH2:13][CH2:14][CH:15]([O:19][CH3:20])[CH2:16][CH2:17]Br.[H-].[Na+]>C1COCC1>[Br:1][C:2]1[CH:10]=[C:9]2[C:5]([CH2:6][C:7]3([CH2:17][CH2:16][CH:15]([O:19][CH3:20])[CH2:14][CH2:13]3)[C:8]2=[O:11])=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 1397781-Indanone, 6-bromo-HCID 581977301,5-Dibromo-3-methoxypentane

Product 1

HCID 581972636'-bromo-4-methoxyspiro[cyclohexane-1,2'-inden]-1'(3'H)-oneYield 4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 6-bromo-2,3-dihydro-1H-inden-1-one (1.037 g, 4.94 mmol) and 1,5-dibromo-3-methoxypentane (1.2 g, 4.94 mmol) in THF (16 mL) was added NaH (237.12 mg, 60%, 9.88 mmol) at room temperature. The mixture was refluxes for 3 h. The mixture was quenched with water and extracted with EtOAc. The organic layer was dried and concentrated to give the residue, which was purified by column chromatography to give 6′-bromo-4-methoxyspiro[cyclohexane-1,2′-inden]-1′(3′H)-one (60 mg, 4%).

Workup

  1. customThe mixture was quenched with water
  2. extractionextracted with EtOAc
  3. customThe organic layer was dried
  4. concentrationconcentrated
  5. customto give the residue, which
  6. customwas purified by column chromatography

Sources & evidence

ORD record
ord-cdb90e2f3aba47afbf6ce8d36ab4449d
Source dataset
uspto-grants-2014_11
Patent number
US08889703B2

Linked notes

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