5-{4-(5-Benzyloxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione → 5-{4-(5-Hydroxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}thiazolidine-2,4-dione

HRID 356258Notes

Reaction equation

HRID 356258 reaction equation
C([O:8][C:9]1[N:14]=[C:13]2[N:15]([CH3:53])[C:16]([CH2:18][O:19][C:20]3[CH:52]=[CH:51][C:23]([CH2:24][CH:25]4[S:29][C:28](=[O:30])[N:27](C(C5C=CC=CC=5)(C5C=CC=CC=5)C5C=CC=CC=5)[C:26]4=[O:50])=[CH:22][CH:21]=3)=[N:17][C:12]2=[CH:11][CH:10]=1)C1C=CC=CC=1>[Pd].CO>[OH:8][C:9]1[N:14]=[C:13]2[N:15]([CH3:53])[C:16]([CH2:18][O:19][C:20]3[CH:52]=[CH:51][C:23]([CH2:24][CH:25]4[S:29][C:28](=[O:30])[NH:27][C:26]4=[O:50])=[CH:22][CH:21]=3)=[N:17][C:12]2=[CH:11][CH:10]=1

Participants

4

Reactant 1

HCID 118029495-{4-(5-Benzyloxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione

Product 1

HCID 1784811205-{4-(5-Hydroxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}thiazolidine-2,4-dioneYield 15.5%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A procedure similar to that described in Example 6 was repeated, except that 1.20 g of 5-{4-(5-benzyloxy-3-methylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione (prepared as described in Preparation 95), 1.80 g of 10% w/w palladium-on-charcoal and 50 ml of methanol were used, and that the product was purified by column chromatography through silica gel, using a gradient elution method, with mixtures of ethyl acetate and methanol in ratios ranging from 1:0 to 10:1 by volume as the eluent, to give 0.10 g of the title compound, melting at 240°-242° C.

Workup

  1. customthat the product was purified by column chromatography through silica gel
  2. washa gradient elution method

Sources & evidence

ORD record
ord-a7b67497246944f7b0d247892f6d9946
Source dataset
uspto-grants-1998_11
Patent number
US05834501

Reaction notes

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