Formic Acid → 2,2,2-Trifluoro-N-((1S,4S)-4-hydroxy-1,2,3,4-tetrahydro-naphthalen-1-yl)-acetamide

Temperature

50 °C

Argon was bubbled through a solution of Intermediate 1b (8.00 g, 31.1 mmol) and [N-[(1S,2S)-2-(amino-κN)-1,2-diphenylethyl]-4-methylbenzenesulfonamidato-κN]chloro[(1,2,3,4,5,6-η)-1-methyl-4-(1-methylethyl)benzene]-ruthenium (Strem Chemicals Inc.; 0.06 g, 0.93 mmol) in dry DMF (100 mL) for 10 min. A premixed combination of formic acid (2.4 mL, 62.2 mmol) and Et3N (8.60 mL, 62.2 mmol) was added, and the mixture stirred at 50° C. for 24 h. The mixture was cooled to room temperature and concentrated to ˜25 mL. Water (70 mL) was added and the resulting precipitate filtered, and washed with DCM (3×30 mL) and diethyl ether (30 mL) to leave a solid (4.75 g). The filtrate was decanted to leave a dark solid. Subsequent purification by FCC using 0-30% EtOAc in cyclohexane gave a solid. This was combined with the first obtained solid to give a beige solid (5.93 g, 74%). 1H NMR (400 MHz, d6-DMSO): 1.60-1.83 (2H, m), 2.06-2.17 (2H, m), 4.60 (1H, m), 5.08 (1H, m), 5.28 (1H, d), 7.07 (1H, m), 7.25 (1H, ddd), 7.28 (1H, ddd), 7.50 (1H, dd), 9.78 (1H, d).

1. temperatureThe mixture was cooled to room temperature
2. concentrationconcentrated to ˜25 mL
3. additionWater (70 mL) was added
4. filtrationthe resulting precipitate filtered
5. washwashed with DCM (3×30 mL) and diethyl ether (30 mL)

ORD record

ord-24aad043fa464590906051ca5476ba7b

Source dataset

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08835431B2