Troglitazone → 2-[4-(2,4-Dioxothiazolidin-5-ylmethyl)phenoxymethyl]-2,5,7,8-tetramethylchroman-6-yl hydrogen succinate

HRID 1030371Notes

Reaction equation

HRID 1030371 reaction equation
[OH:1][C:2]1[C:3]([CH3:31])=[C:4]2[C:9](=[C:10]([CH3:13])[C:11]=1[CH3:12])[O:8][C:7]([CH2:15][O:16][C:17]1[CH:30]=[CH:29][C:20]([CH2:21][CH:22]3[S:26][C:25](=[O:27])[NH:24][C:23]3=[O:28])=[CH:19][CH:18]=1)([CH3:14])[CH2:6][CH2:5]2.[C:32]1(=[O:38])[O:37][C:35](=[O:36])[CH2:34][CH2:33]1>N1C=CC=CC=1>[C:32]([O:1][C:2]1[C:3]([CH3:31])=[C:4]2[C:9](=[C:10]([CH3:13])[C:11]=1[CH3:12])[O:8][C:7]([CH2:15][O:16][C:17]1[CH:30]=[CH:29][C:20]([CH2:21][CH:22]3[S:26][C:25](=[O:27])[NH:24][C:23]3=[O:28])=[CH:19][CH:18]=1)([CH3:14])[CH2:6][CH2:5]2)(=[O:38])[CH2:33][CH2:34][C:35]([OH:37])=[O:36]

Participants

4

Reactant 2

HCID 5591TroglitazoneHCID 7922Succinic anhydride

Product 1

HCID 179941992-[4-(2,4-Dioxothiazolidin-5-ylmethyl)phenoxymethyl]-2,5,7,8-tetramethylchroman-6-yl hydrogen succinate

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

A mixture of 1.0 g of 5-[4-(6-hydroxy-2,5,7,8-tetramethylchroman-2-ylmethoxy)benzyl]thiazolidine -2,4-dione (prepared as described in Example 28), 0.31 g of succinic anhydride and 1 ml of pyridine was allowed to stand overnight at room temperature. The reaction mixture was then washed 3 times, each time with 10 ml of cyclohexane, and the insoluble residue obtained was purified by silica gel column chromatography (eluted by mixtures of benzene and ethyl acetate ranging from 5:1 to 1:1) to give the title compound melting at 197°-202° C.

Workup

  1. washThe reaction mixture was then washed 3 times
  2. customeach time with 10 ml of cyclohexane, and the insoluble residue obtained
  3. customwas purified by silica gel column chromatography (eluted by mixtures of benzene and ethyl acetate ranging from 5:1 to 1:1)

Sources & evidence

ORD record
ord-a16edc0a0af94d99abb80a245c6b1ca3
Source dataset
uspto-grants-1992_04
Patent number
US05104888

Reaction notes

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