2,4,6-Triisopropylbenzoyl chloride → HCID 10728422, compound

HRID 2393262Notes

Reaction equation

HRID 2393262 reaction equation
[CH:1]([C:4]1[CH:12]=[C:11]([CH:13]([CH3:15])[CH3:14])[CH:10]=[C:9]([CH:16]([CH3:18])[CH3:17])[C:5]=1[C:6](Cl)=[O:7])([CH3:3])[CH3:2].[H-].[Al+3].[Li+].[H-].[H-].[H-]>C(OCC)C>[CH:16]([C:9]1[CH:10]=[C:11]([CH:13]([CH3:15])[CH3:14])[CH:12]=[C:4]([CH:1]([CH3:3])[CH3:2])[C:5]=1[CH2:6][OH:7])([CH3:18])[CH3:17]

Participants

4

Reactant 2

HCID 926972,4,6-Triisopropylbenzoyl chlorideHCID 21226445Aluminium lithium hydride

Product 1

HCID 10728422HCID 10728422, compoundYield 3.5%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent2×

Procedure

A solution of 2,4,6-triisopropylbenzoyl chloride (24.96 g, 0.094 mol) in ethyl ether (150 mL) was added in portions over 1 hour to lithium aluminum hydride (3.70 g, 0.097 mol) in ethyl ether (300 mL) keeping the temperature between -15° C. and -30° C. The reaction mixture was allowed to warm to room temperature over about 1 hour. The reaction mixture was cooled to 0° C. and quenched by adding saturated aqueous sodium bisulfate solution. The layers were separated, the aqueous layer was back-extracted with ethyl acetate, the organic layers were combined and dried (magnesium sulfate), filtered, and concentrated to a white solid (21.50 g, 98% crude). An analytical sample was obtained by filtering 1.0 g through silica gel using hexanes, then 5% ethyl acetate in hexanes as eluant yielding 0.778 g of the product as a white solid.

Workup

  1. customthe temperature between -15° C. and -30° C
  2. temperatureThe reaction mixture was cooled to 0° C.
  3. customquenched
  4. additionby adding saturated aqueous sodium bisulfate solution
  5. customThe layers were separated
  6. extractionthe aqueous layer was back-extracted with ethyl acetate
  7. dry with materialdried (magnesium sulfate)
  8. filtrationfiltered
  9. concentrationconcentrated to a white solid (21.50 g, 98% crude)
  10. customAn analytical sample was obtained
  11. filtrationby filtering 1.0 g through silica gel

Sources & evidence

ORD record
ord-05e2c3be383c4f169bdd602db8dc0619
Source dataset
uspto-grants-1998_09
Patent number
US05807846

Reaction notes

Loading…