Water → cis-3-Azido-4-(4-bromophenoxy)tetrahydrofuran

Participants

Reaction Conditions

Reaction Steps

To a solution of trans-4-(4-bromophenoxy)tetrahydrofuran-3-yl methanesulfonate (133.2 g, 0.395 mol) in dimethylformamide (3 L) was added sodium azide (192.6 g, 2.96 mol) and the reaction was heated at 110° C. for 66 hours. The reaction was cooled to room temperature and water (12 L) was added. This reaction was carried out a total of three times on the same scale, and the combined batches were extracted with tert-butyl methyl ether. The organic layers were then dried over sodium sulfate and concentrated in vacuo to afford product as a red-brown oil, contaminated with 18% dimethylformamide. Corrected yield: 286.7 g, 1.01 mol, 85%. 1H NMR (400 MHz, CDCl3) δ 3.93-3.97 (m, 2H), 4.00 (m, 1H), 4.09 (dd, J=8.7, 5.8 Hz, 1H), 4.17 (dd, J=10.0, 5.6 Hz, 1H), 4.90 (ddd, J=5.4, 5.4, 4.4 Hz, 1H), 6.83 (d, J=9.1 Hz, 2H), 7.41 (d, J=9.0 Hz, 2H).

Provenance & Evidence