Hydrochloric Acid → Pivaloyloxymethyl 1-[(2'-carboxybiphenyl-4-yl)methyl]-4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate

HRID 265047Notes

Reaction equation

HRID 265047 reaction equation
C([O:5][C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:14]1[CH:19]=[CH:18][C:17]([CH2:20][N:21]2[C:25]([C:26]([O:28][CH2:29][O:30][C:31](=[O:36])[C:32]([CH3:35])([CH3:34])[CH3:33])=[O:27])=[C:24]([C:37]([OH:40])([CH3:39])[CH3:38])[N:23]=[C:22]2[CH2:41][CH2:42][CH3:43])=[CH:16][CH:15]=1)=[O:7])(C)(C)C.Cl>O1CCOCC1>[C:6]([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=1[C:14]1[CH:15]=[CH:16][C:17]([CH2:20][N:21]2[C:25]([C:26]([O:28][CH2:29][O:30][C:31](=[O:36])[C:32]([CH3:35])([CH3:34])[CH3:33])=[O:27])=[C:24]([C:37]([OH:40])([CH3:39])[CH3:38])[N:23]=[C:22]2[CH2:41][CH2:42][CH3:43])=[CH:18][CH:19]=1)([OH:7])=[O:5]

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 10579348Pivaloyloxymethyl 1-[(2'-t-butoxycarbonylbiphenyl-4-yl)methyl]-4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate

Product 1

HCID 10816196Pivaloyloxymethyl 1-[(2'-carboxybiphenyl-4-yl)methyl]-4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylateYield 109.1%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Procedure

A mixture of 6.6 g of pivaloyloxymethyl 1-[(2'-t-butoxycarbonylbiphenyl -4-yl)methyl]-4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate [prepared as described in step (c) above] and 57 ml of a 4N solution of hydrogen chloride in dioxane was stirred at room temperature for 4 hours. At the end of this time, the reaction mixture was concentrated by evaporation under reduced pressure, and the residue was triturated with ethyl acetate to crystallize it, giving 6.52 g of the title compound as the hydrochloride, melting at 170°-173° C.

Workup

  1. concentrationAt the end of this time, the reaction mixture was concentrated by evaporation under reduced pressure
  2. customthe residue was triturated with ethyl acetate
  3. customto crystallize it

Sources & evidence

ORD record
ord-eefef9afec9d4d9d9973222c364f5ba7
Source dataset
uspto-grants-1997_07
Patent number
US05646171

Reaction notes

Loading…