HCID 14802187, compound → HCID 14802188, compound

HRID 2350997Notes

Reaction equation

HRID 2350997 reaction equation
[H-].[Al+3].[Li+].[H-].[H-].[H-].[OH:7][C:8]1[C:9]([CH3:28])=[C:10]([CH3:27])[C:11]2[O:15][CH:14]([CH2:16][CH2:17][CH2:18][C:19]([CH3:24])([CH3:23])[C:20](O)=[O:21])[S:13][C:12]=2[C:25]=1[CH3:26]>O1CCCC1>[OH:7][C:8]1[C:9]([CH3:28])=[C:10]([CH3:27])[C:11]2[O:15][CH:14]([CH2:16][CH2:17][CH2:18][C:19]([CH3:24])([CH3:23])[CH2:20][OH:21])[S:13][C:12]=2[C:25]=1[CH3:26]

Participants

4

Reactant 2

HCID 14802187HCID 14802187, compoundHCID 21226445Aluminium lithium hydride

Product 1

HCID 14802188HCID 14802188, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

0.3 g of lithium aluminum hydride was suspended in 30 ml of tetrahydrofuran, and a solution of 1.7 g of 5-(5-hydroxy-4,6,7-trimethyl-1,3-benzoxathiole-2-yl)-2,2-dimethylpentanoic acid (prepared as described in Example 81) in 5 ml of tetrahydrofuran was added dropwise under a stream of nitrogen and with ice-cooling to the suspension. After the dropwise addition, the reaction mixture was kept at room temperature for 1 hour and was then heated under reflux for 2 hours. The reaction mixture was then poured into ice-water and extracted with ethyl acetate. The extract was washed with water and dried over anhydrous sodium sulfate, after which the ethyl acetate was distilled off under reduced pressure. The resulting residue was subjected to silica gel Lobar column chromatography, and the title compound was obtained by elution with a 9:1 by volume mixture of benzene and ethyl acetate.

Workup

  1. temperaturecooling to the suspension
  2. additionAfter the dropwise addition
  3. temperaturewas then heated
  4. temperatureunder reflux for 2 hours
  5. extractionextracted with ethyl acetate
  6. washThe extract was washed with water
  7. dry with materialdried over anhydrous sodium sulfate
  8. distillationafter which the ethyl acetate was distilled off under reduced pressure

Sources & evidence

ORD record
ord-ff02d96079b44c80ad33feb5b207bc7a
Source dataset
uspto-grants-1989_10
Patent number
US04871762

Reaction notes

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