Triethyl phosphite → Diethyl 3-iodobenzylphosphonate

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-iodobenzyl bromide 12 (5 g, 16.84 mmol) and triethyl phosphite (3.3 g, 20 mmol) was stirred at 160° C. After 4 h, the mixture was cooled to room temperature. The residue was subjected to flash chromatography (EtOAc: Hex, 1:4), and gave 5.4 g of 13 (91%). 1H NMR (200 MHz, CDCl3): δ1.15 (t, J=7.05 Hz, 6H), 2.97 (d, J=21.65 Hz, 2H), 3.92 (m, 4H), 6.93 (t, J=7.76 Hz, 1H), 7.17 (m, 1H), 7.52 (m, 2H); 13C NMR (50 MHz, CDCl3): δ 16.25 (J=5.95 Hz), 33.15 (J=137.60 Hz), 62.19 (J=6.70 Hz), 94.13 (J=3.50 Hz), 128.89 (J=6.35 Hz), 130.07 (J=3.00 Hz), 133.95 (J=9.10 Hz), 135.87 (J=3.55 Hz), 138.51 (J=6.65 Hz).

Provenance & Evidence