Sodium Hydroxide → 6-(1,3-Dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoic acid

HRID 2396624Notes

Reaction equation

HRID 2396624 reaction equation
[CH3:1][O:2][C:3]1[C:11]([CH3:12])=[C:10]2[C:6]([C:7](=[O:13])[O:8][CH2:9]2)=[C:5]([O:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH3:20])[C:4]=1[CH2:21]/[CH:22]=[C:23](\[CH3:30])/[CH2:24][CH2:25][C:26]([O:28]C)=[O:27].[OH-].[Na+]>CO.O>[CH3:1][O:2][C:3]1[C:11]([CH3:12])=[C:10]2[C:6]([C:7](=[O:13])[O:8][CH2:9]2)=[C:5]([O:14][CH2:15][O:16][CH2:17][CH2:18][O:19][CH3:20])[C:4]=1[CH2:21][CH:22]=[C:23]([CH3:30])[CH2:24][CH2:25][C:26]([OH:28])=[O:27]

Participants

5

Reactant 2

HCID 14798Sodium HydroxideHCID 10342183(E)-6-[1,3-Dihydro-6-methoxy-4-[(2-methoxyethoxy)methoxy]-7-methyl-3-oxo-5-isobenzofuranyl]-4-methyl-4-hexenoic Acid Methyl Ester

Product 1

HCID 572018826-(1,3-Dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoic acid

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

To methyl (E) 6-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoate (76.0 g) in methanol (300 ml) was added 1N aqueous sodium hydroxide (300 ml). After 11/2 hours the solution was diluted with water, washed twice with ether, then acidified with dilute hydrochloric acid. The acidified solution was extracted with ether, and the extract was dried and evaporated to give (E) 6-(1,3-dihydro-6-methoxy-4-methoxyethoxymethoxy-7-methyl-3-oxoisobenzofuran-5-yl)-4-methyl-4-hexenoic acid, m.p. 77°-82° C. (etherhexane).

Workup

  1. washwashed twice with ether
  2. extractionThe acidified solution was extracted with ether
  3. customthe extract was dried
  4. customevaporated

Sources & evidence

ORD record
ord-108c7bbdc6a5466db0054ac280f33eca
Source dataset
uspto-grants-1996_02
Patent number
US05493030

Reaction notes

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