Tributylphosphine → 5-{4-(3,5,7-Trimethylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dione

HRID 1953735Notes

Reaction equation

HRID 1953735 reaction equation
[OH:1][CH2:2][C:3]1[N:4]([CH3:14])[C:5]2[C:10]([N:11]=1)=[C:9]([CH3:12])[CH:8]=[C:7]([CH3:13])[N:6]=2.O[C:16]1[CH:48]=[CH:47][C:19]([CH2:20][CH:21]2[S:25][C:24](=[O:26])[N:23]([C:27]([C:40]3[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=3)([C:34]3[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=3)[C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=3)[C:22]2=[O:46])=[CH:18][CH:17]=1.C(P(CCCC)CCCC)CCC.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O>C1(C)C=CC=CC=1>[CH3:14][N:4]1[C:5]2=[N:6][C:7]([CH3:13])=[CH:8][C:9]([CH3:12])=[C:10]2[N:11]=[C:3]1[CH2:2][O:1][C:16]1[CH:48]=[CH:47][C:19]([CH2:20][CH:21]2[S:25][C:24](=[O:26])[N:23]([C:27]([C:40]3[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=3)([C:34]3[CH:35]=[CH:36][CH:37]=[CH:38][CH:39]=3)[C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=3)[C:22]2=[O:46])=[CH:18][CH:17]=1

Participants

6

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 28181265-(4-Hydroxybenzyl)-3-triphenylmethylthiazolidine-2,4-dioneHCID 107263792-Hydroxymethyl3,5,7-trimethylimidazo[5,4-b]pyridine

Product 1

HCID 105561015-{4-(3,5,7-Trimethylimidazo[5,4-b]pyridin-2-ylmethoxy)benzyl}-3-triphenylmethylthiazolidine-2,4-dioneYield 71.3%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A procedure similar to that described in Preparation 4 was repeated, except that 1.47 g of 2-hydroxymethyl-3,5,7-trimethylimidazo[5,4-b]pyridine (prepared as described in Preparation 86), 3.58 g of 5-(4-hydroxy-benzyl)-3-triphenylmethyl-thiazolidine-2,4-dione, 1.87 g of tributylphosphine, 2.33 g of 1,1'-(azodicarbonyl) dipiperidine and 50 ml of toluene were used. After working up the product as described in Preparation 4, the resulting crude product was purified by column chromatography through silica gel, using a 1:1 by volume mixture of hexane and ethyl acetate as the eluent, to give 3.5 g of the title compound, melting at 96-990° C. (softening).

Workup

  1. customA procedure similar to that described in Preparation 4
  2. customas described in Preparation 4
  3. customthe resulting crude product was purified by column chromatography through silica gel
  4. additionby volume mixture of hexane and ethyl acetate as the eluent

Sources & evidence

ORD record
ord-3ac60cb687c14e918824f7949f6761b9
Source dataset
uspto-grants-2000_09
Patent number
US06117893

Reaction notes

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