ethyl (2S*,3R*)-2-amino-3-hydroxy-4,4-dimethyl-pentanoate → (2S,3R)-2-Amino-3-Hydroxy-4,4-Dimethylpentanoic Acid

Temperature

130 °C

In a round-bottomed flask, ethyl (2S*,3R*)-2-amino-3-hydroxy-4,4-dimethyl-pentanoate (0.596 g, 3.7 mmol) was dissolved in a 6.0 M HCl solution (70 mL). The resulting solution was divided into two equal aliquots and stirred at 130° C. for 1 h. All portions were joined and the reaction mixture extracted with Et2O (3×50 ml). The aqueous phase was concentrated under reduced pressure and the resulting yellowish solid crude product (0.675 g, 93%) was used without further purification in the following reaction. MS (ESI) m/z: 162 [M−H]+; (ESI) m/z: 160 [M−H]−. 1H NMR (DMSO-d6) δ 0.91 (s, 9H), 3.66 (d, J=3.24 Hz, 1H), 3.89 (s, 1H), 5.95 (d, J=6.39 Hz, 1H), 7.92 (s, 3H), 13.88 (s, 1H).

1. extractionthe reaction mixture extracted with Et2O (3×50 ml)
2. concentrationThe aqueous phase was concentrated under reduced pressure
3. customthe resulting yellowish solid crude product (0.675 g, 93%) was used without further purification in the following reaction

ORD record

ord-5ae4f79ecacb4042bb4aa6c1a0a1e6bb

Source dataset

uspto-grants-2016_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09353075B2