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ChemicalBook CAS DataBase List (S)-2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoic acid
1191997-64-4

(S)-2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoic acid synthesis

4synthesis methods
(S)-methyl 2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoate

1191997-63-3
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(S)-2-(4-(2-chlorophenoxy)-2-oxo-2,5-dihydro-1H-pyrrol-1-yl)-4-methylpentanoic acid

1191997-64-4
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Yield:1191997-64-4 96%

Reaction Conditions:

with lithium hydroxide monohydrate;water in tetrahydrofuran at 25; for 2 h;

Steps:

1.G; 2.F

To a solution containing compound 6-1 (1.16 g, 3.43 mmol) in tetrahydrofuran (10 mL) was treated with an aqueous solution of lithium hydroxide monohydrate (180.1 mg, 4.22 mmol) in water (7 mL). The mixture was stirred at 25°C for 2 h, and then it was acidified with a 2N aqueous hydrochloric acid solution. The mixture was extracted with dichloromethane (2×20 mL). The combined organic layer was dried with magnesium sulfate and concentrated to obtain pure product 7-1 (1.07g, 96%):

References:

CN113493442,2021,A Location in patent:Paragraph 0129-0130; 0143-0144; 0147-0148; 0159-0160