反应详情

Trifluoroacetic acid (3 mL, 40.39 mmol) was added to a solution of tert-butyl N-[(3R)-3-[3-[4-(5-ethoxy-2-fluoro-phenyl)-6-methyl-pyrimidin-2-yl]prop-2-ynyl]-1-methyl-2-oxo-pyrrolidin-3-yl]carbamate (which may be prepared as described in Description 18) (605 mg, 1.25 mmol) in DCM (15 mL) at 20° C. and the reaction was stirred for 1 hour. Solid K2CO3 was added to quench the TFA present (care: gas evolved) and the resultant solid was filtered off and washed five times with DCM. The solvent was evaporated to give the (3R)-3-amino-3-[3-[4-(5-ethoxy-2-fluoro-phenyl)-6-methyl-pyrimidin-2-yl]prop-2-ynyl]-1-methyl-pyrrolidin-2-one (D19) (447 mg, 1.1688 mmol, 93.2% yield) as a yellow oil.

1. customto quench the TFA present (care: gas evolved)
2. filtrationthe resultant solid was filtered off
3. washwashed five times with DCM
4. customThe solvent was evaporated