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Acetic Acid → Troglitazone

HRID 1589678
Notes
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Reaction equation

HRID 1589678 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](=N)[NH:24][C:23]3=[O:28])=[CH:19][CH:18]=1)([CH3:14])[CH2:6][CH2:5]2.C(O)(=[O:34])C.Cl>O>[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:34])[NH:24][C:23]3=[O:28])=[CH:19][CH:18]=1)([CH3:14])[CH2:6][CH2:5]2
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 313Hydrochloric AcidHCID 1403415895-[[4-[(6-Hydroxy-2,5,7,8-tetramethyl-3,4-dihydrochromen-2-yl)methoxy]phenyl]methyl]-2-imino-1,3-thiazolidin-4-one

Product 1

HCID 5591Troglitazone

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

3.1 g of 5-[4-(6-hydroxy-2,5,7,8-tetramethylchroman-2-ylmethoxy)benzyl]-2-iminothiazolidin-4-one [prepared as described in Example 1(a)] were added to a mixture of 45 ml of acetic acid, 15 ml of concentrated hydrochloric acid and 8 ml of water, and the mixture was reacted for 12 hours at 85°-90° C. It was then processed and purified in a similar manner to Example 1(a), giving 2.5 g of 5-[4-(6-hydroxy-2,5,7,8-tetramethylchroman-2-ylmethoxy)benzyl]thiazolidine-2,4-dione, whose melting point and nuclear magnetic resonance spectrum were consistent with those of the product of Example 1(b).

Workup

  1. customthe mixture was reacted for 12 hours at 85°-90° C
  2. custompurified in a similar manner to Example 1(a)

Sources & evidence

ORD record
ord-afcd4aea385045c3a08381b6d6612814
Source dataset
uspto-grants-1986_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US04572912

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes