Hydrochloric Acid → HCID 22178188, compound

Optically active methyl 4-cyano-3-hydroxy-4-methylpentanoate (2 g, 11.7 mmol) was dissolved in THF (10 mL) and methanol (5 mL) was added. An aqueous sodium borohydride (885 mg, 23.4 mmol) solution (5 mL) was dropwise added at room temperature. The mixture was stirred at room temperature for 3 hr and then 2N aqueous hydrochloric acid solution (15 mL) was dropwise added at 0° C. Ethyl acetate (20 mL) was added and the mixture was stirred vigorously. An organic layer was extracted. Ethyl acetate (20 mL) was further added to the aqueous layer and the mixture was stirred vigorously. The organic layer was extracted again. This step was repeated three times and the obtained organic layer was dried over anhydrous magnesium sulfate (2 g) and concentrated under reduced pressure to give optically active 4-cyano-4-methyl-3-hydroxy-1-pentanol (1.12 g, 7.84 mmol) (yield relative to optically active methyl 4-cyano-3-hydroxy-4-methylpentanoate: 67%).

1. stirringthe mixture was stirred vigorously
2. extractionAn organic layer was extracted
3. additionEthyl acetate (20 mL) was further added to the aqueous layer
4. stirringthe mixture was stirred vigorously
5. extractionThe organic layer was extracted again
6. dry with materialthe obtained organic layer was dried over anhydrous magnesium sulfate (2 g)
7. concentrationconcentrated under reduced pressure

ORD record

ord-9aa4a6dde3154a9eaf45f621f0fc29a3

Source dataset

uspto-grants-2004_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06730803B2