(2-Ethoxyphenyl)boronic acid → 4-(2-ethoxyphenyl)-9-hydroxypyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione

Beteiligte Stoffe

Reaktionsschritte

The reaction of 9-hydroxy-4-iodopyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione, prepared as in example 7, with 2-ethoxybenzeneboronic acid according to the procedure described in example 8 gave 4-(2-ethoxyphenyl)-9-hydroxypyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione (504) (I; Ar=2-ethoxyphenyl) in a 74% yield; mp (THF/CH2Cl2/hexane) 190–193° C. (dec). 1H NMR [(CD3)2SO] δ 11.71 (br s, 1H), 10.91 (br s, 1H), 9.23 (s, 1H), 8.31 (d, J=2.4 Hz, 1H), 7.51 (s, 1H), 7.43 (d, J=8.7 Hz, 1H), 7.38 (td, J=7.8, 1.7 Hz, 1H), 7.33 (dd, J=7.5, 1.7 Hz, 1H), 7.07 (br d, J=6.7 Hz, 1H), 7.05 (dd, J=8.7, 2.3 Hz, 1H), 7.02 (dd, J=7.3, 6.6 Hz, 1H), 3.97 (q, J=6.7 Hz, 2H), 1.11 (t, J=6.9 Hz, 3H). Found: C, 70.63; H, 4.74; N, 6.88. C22H16N2O4.1/4 THF requires C, 70.76; H, 4.65; N, 7.18.

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