1-Iodopentane → 4-Bromo-4'-(pentyloxy)-1,1'-biphenyl

Participants

Reaction Conditions

Reaction Steps

4-Bromo-4′-hydroxybiphenyl (12.5 g, 50.2 mmol) was added to a solution of NaOH (2.28 g, 97% pure, 55.2 mmol) in deionized H2O (150 ml), followed by the addition of 1-iodopentane (11.9 g, 60.2 mmol) and tetrabutylammonium bromide (0.82 g, 2.5 mmol). The mixture was stirred at 90° C. for 3.75 h until the solids went into solution. Then, as the reaction proceeded, the desired product began to precipitate. The mixture was slowly cooled and then filtered to provide a solid which was washed with deionized water until the pH of the filtrate was neutral and then dried for 16 h in a vacuum oven at 30° C. Yield: 15.41 g (96%) of 5a. Rf 0.5 (97:3 hexanes/EtOAc). 1H NMR: δ 0.93 (t, 3H, J=6.9 Hz); 1.41 (m, 4H); 1.79 (m, 2H); 3.97 (t, 2H, J=6.6 Hz); 6.98 (m, 2H); 7.23 (m,6H). 13C NMR: δ 14.03; 22.43; 28.22; 28.98; 68.12; 114.91; 120.71; 127.93; 128.27; 131.77; 132.24; 139.82; 159.03. MS(FAB+): m/z 320. IR(CHCl3): 2960, 2936, 2874, 1608, 1518, 1485, 1475 cm−1 Analysis for C17H19BrO: Calcd: C, 63.96; H. 6.00; Br, 25.0; Found: C, 64.10; H. 5.97; Br, 25.28.

Provenance & Evidence