Lithium hydroxide, monohydrate → (R)-3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoic acid

HRID 2062218Notes

Reaction equation

HRID 2062218 reaction equation
[OH:1][C@@H:2]([C:8]([N:10]1[CH2:15][CH2:14][N:13]([C:16]2[C:25]3[C:20](=[CH:21][C:22]([CH3:26])=[CH:23][CH:24]=3)[N:19]=[C:18]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=3[OH:33])[N:17]=2)[CH2:12][CH2:11]1)=[O:9])[CH2:3][C:4]([O:6]C)=[O:5].O[Li].O>C1COCC1.O>[OH:1][C@@H:2]([C:8]([N:10]1[CH2:11][CH2:12][N:13]([C:16]2[C:25]3[C:20](=[CH:21][C:22]([CH3:26])=[CH:23][CH:24]=3)[N:19]=[C:18]([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][C:28]=3[OH:33])[N:17]=2)[CH2:14][CH2:15]1)=[O:9])[CH2:3][C:4]([OH:6])=[O:5]

Participants

4

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 136121665(R)-methyl 3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoate

Product 1

HCID 136121458(R)-3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoic acidYield 88%

Reagents, catalysts & solvents 1

HCID 21881883Oxolane--water (1/1)Solvent

Procedure

(R)-Methyl 3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoate (88 mg, 0.20 mmol) and LiOH.H2O (33 mg, 0.78 mmol) were stirred in THF:H2O 1:1 at room temperature for 3 h. After acidification with 1 M HCl and extraction with EtOAc, the organic extracts were washed with water, dried over Na2SO4, and concentrated. The crude material was then purified via silica gel chromatography using 0-10% MeOH/CH2Cl2 to obtain (R)-3-hydroxy-4-(4-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-4-oxobutanoic acid (75 mg, 88%). LC/MS: m/z 437.3 (M+H)+ at 2.04 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Workup

  1. extractionAfter acidification with 1 M HCl and extraction with EtOAc
  2. washthe organic extracts were washed with water
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe crude material was then purified via silica gel chromatography

Sources & evidence

ORD record
ord-22e018e882104a58851975e0a297e5a4
Source dataset
uspto-grants-2012_10
Patent number
US08283354B2

Reaction notes

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