反应详情

To a stirred solution of ethyl 5-fluoro-1-oxo-1,3-dihydrospiro[indene-2,4′-piperidine]-1′-carboxylate (188 mg, 0.645 mmol) in HCl (19.61 μL, 0.645 mmol) was heated at 100° C. over night. The reaction mixture was concentrated to dryness without any further purification to give the title compound (160 mg, 97% yield). MS (ESI) [m/e, (M+H)+]=220.0 (M+H)+, HPLC retention time=0.51 minutes (Agilent 1100 HPLC system; 3.0 cm×3.0 mm×3.0 um C8 column; flow rate of 2.0 mL/min; gradient of 5-95% acetonitrile/water with 0.1% fomic acid over 2 minutes).

1. concentrationThe reaction mixture was concentrated to dryness without any further purification