Boron Trichloride → HCID 19594941, compound

Participants

Reaction Steps

Combine 5-isopropoxy-2-methoxy-fluoren-9-one (0.78 g, 2.9 mmole) with boron trichloride (6.50 mL of 1.0 M in methylene chloride) in 20 mL methylene chloride at a temperature between 0° and -50° C. Stir the reaction for 1 hour at 5° C., then quench with 20 mL of water, ensuring the temperature is kept below 20° C. The solution changes from a dark brown solution to red as a flocculent solid precipitates. m.p 245°-248° C. Filter the precipitate to obtain 0.296 g of a red solid. m.p 245°-248° C.

Provenance & Evidence