Acetyl chloride → 9-Acetyl-1,2-dihydrocyclopenta[c]carbazol-3(6H)-one

Participants

Reaction Steps

1,2-dihydro-6H-cyclopenta[c]carbazole-3-one 90 (6 g, 27.1 mmol) was suspended in dry CH2Cl2 (100 mL). Anhydrous AlCl3 (6 g, 45 mmol) was added with stirring on ice bath, followed by the dropwise addition of AcCl (2.4 mL, 33.2 mmol). The reaction mixture was stirred at about 5° C. for 24 h, and poured into ice water. The precipitated grey solid was filtered off, washed with water (2×100 mL), acetone (3×50 mL), diethyl ether (3×50 mL) to give 4 g (56.3%) of 9-acetyl-1,2-dihydro-6H-cyclopenta[c]carbazole-3-one 91.

Provenance & Evidence