Nitrogen → 7-(acetylamino)-9a-butyl-6-fluoro-1,2,9,9a-tetrahydro-3H-fluoren-3-one

Participants

Reaction Steps

A solution of 7-amino-9a-butyl-6-fluoro-1,2,9,9a-tetrahydro-3H-fluoren-3-one (1.12 g, 4.1 mmol) in anhydrous CH2Cl2 (13.7 mL) was purged with N2, cooled in an ice bath, and treated with pyridine (0.33 mL, 4.1 mmol) followed by acetyl chloride (0.65 mL, 9 mmol). After stirring at 0–5° C. for 4.5 hours, the reaction mixture was partitioned between water and EtOAc. The organic portion was washed with brine, dried over MgSO4, filtered, and concentrated under vacuum to provide 7-(acetylamino)-9a-butyl-6-fluoro-1,2,9,9a-tetrahydro-3H-fluoren-3-one (1.1 g) as an orange foam. This material was used without further purification.

Provenance & Evidence