Benzyl chloroformate → HCID 86724734, compound

Participants

Reaction Steps

8.7 g (52.36 mmol) of rac-2-amino-5,5,5-trifluoro-2-methylpentanonitrile from Example 60A were initially charged in 128 ml of tetrahydrofuran/water=9/1, and 22.43 g (162.3 mmol) of potassium carbonate were added. At 0° C., 8.93 g (52.36 mmol) of benzyl chloroformate were added dropwise. Then the mixture was allowed to warm up gradually to room temperature and stirred at room temperature overnight. The supernatant solvent was decanted off, the residue was twice stirred with 100 ml each time of tetrahydrofuran, and then the supernatant solvent was decanted off each time. The combined organic phases were concentrated and the crude product was purified by means of silica gel chromatography (eluent:cyclohexane/ethyl acetate gradient 9/1 to 4/1). 11.14 g of the title compound were obtained (68% of theory).

Provenance & Evidence