Benzyl Bromide → 9-[(phenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one

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A suspension of 5-carbomethoxy-1,2-dihydro-9H-carbazol-4(3H)-one (300 mg, 1.23 mM), benzyl bromide (210 mg, 1.23 mM), and potassium carbonate (170 mg, 1.23 mM) in 15 mL DMF was stirred at room temperature for 6 hours. The mixture was diluted with 80 mL H2O and chilled in the refrigerator. The resultant white precipitate was collected by filtration, washed with H2O, and dried in vacuo to afford 325 mg (79%) of the 9-[(phenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one as a white solid. 1H NMR (DMSO-d6) δ7.7 (dd, 1H, J=1 and 8 Hz), 7.45-7.0 (m, 7H), 5.6 (s, 2H), 3.8 (s, 3H), 3.05 (t, 2H, J=6 Hz), 2.5 (t, 2H, J=6 Hz), and 2.2 (m, 2H). IR (KBr, cm−1) 3421, 1726, 1676, 1636, 1473, 1450, 1435, 1288, 1122, 764, 745, and 706. MS (ES) m/e 334.

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