Lithium hydroxide, monohydrate → 1-[(2'-t-Butoxycarbonylbiphenyl-4-yl)methyl]-2-butyl-4-hydroxymethylimidazole-5-carboxylic acid

HRID 265023Notes

Reaction equation

HRID 265023 reaction equation
O.[OH-].[Li+].[C:4]([O:8][C:9]([C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[C:17]1[CH:22]=[CH:21][C:20]([CH2:23][N:24]2[C:28]([C:29]([O:31]C)=[O:30])=[C:27]([C:33](OC)=[O:34])[N:26]=[C:25]2[CH2:37][CH2:38][CH2:39][CH3:40])=[CH:19][CH:18]=1)=[O:10])([CH3:7])([CH3:6])[CH3:5]>O.O1CCOCC1>[C:4]([O:8][C:9]([C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=1[C:17]1[CH:22]=[CH:21][C:20]([CH2:23][N:24]2[C:28]([C:29]([OH:31])=[O:30])=[C:27]([CH2:33][OH:34])[N:26]=[C:25]2[CH2:37][CH2:38][CH2:39][CH3:40])=[CH:19][CH:18]=1)=[O:10])([CH3:7])([CH3:6])[CH3:5]

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 19036225Dimethyl 1-[(2'-t-butoxycarbonylbiphenyl-4-yl)methyl]-2-butylimidazole-4,5-dicarboxylate

Product 1

HCID 190361191-[(2'-t-Butoxycarbonylbiphenyl-4-yl)methyl]-2-butyl-4-hydroxymethylimidazole-5-carboxylic acidYield 97.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Procedure

A solution of 2.01 g of lithium hydroxide monohydrate in 97 ml of water was added to a solution of 4.78 g of methyl 1-[(2'-t-butoxycarbonylbiphenyl -4-yl)methyl]-2-butyl-4-hydroxymethylimidazole-5-carboxylate (prepared as described in Example 1) in 48 ml of dioxane, and the resulting mixture was stirred at room temperature for 18 hours. At the end of this time, the reaction mixture was freed from dioxane by distillation under reduced pressure, and 47.6 ml of 1N aqueous hydrochloric acid were added to the aqueous residue. The crystals which precipitated were collected by filtration and then washed with water and with diethyl ether, in that order, to give 4.26 g of the title compound, melting at 187° C. (with decomposition).

Workup

  1. distillationAt the end of this time, the reaction mixture was freed from dioxane by distillation under reduced pressure, and 47.6 ml of 1N aqueous hydrochloric acid
  2. additionwere added to the aqueous residue
  3. customThe crystals which precipitated
  4. filtrationwere collected by filtration
  5. washwashed with water and with diethyl ether, in that order

Sources & evidence

ORD record
ord-c1b3806a21764ba79853f2f03c98e6b4
Source dataset
uspto-grants-1997_07
Patent number
US05646171

Reaction notes

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