o-Xylyl bromide → 9-[(2-methylphenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one

関与物質

反応手順

A suspension of 5-carbomethoxy-1,2-dihydro-9H-carbazol-4(3H)-one (870 mg, 3.58 mM), a-bromo-o-xylene (662 mg, 3.58 mM), and potassium carbonate (500 mg, 3.61 mM) in 20 mL DMF was stirred at room temperature for 20 hours. The mixture was diluted with ethyl acetate, washed with H2O and saturated brine, dried over anhydrous magnesium sulfate, filtered, concentrated to afford 1.21 g (98%) of the 9-[(2-methylphenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one as a dark oil. 1H NMR (DMSO-d6) δ7.5-7.2 (m, 4H), 7.15 (t, 1H, J=8 Hz), 7.0 (t, 1H, J=8 Hz), 6.15 (d, 1H, J=8 Hz), 5.55 (s, 2H), 3.85 (s, 3H), 2.6 (m, 2H), 2.4 (m, 2H), 2.4 (s, 3H), and 2.1 (m, 2H). IR (CHCl3, cm−1) 3010, 2952, 1724, 1671, 1653, 1604, 1460, 1444, 1290, 1174, and 1122. MS (ES) m/e 348.5.

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