Pyridine → HCID 59310834, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of aminobenzyl bisphosphonate 27 (180 mg, 0.41 mmol) in CH2Cl2 (5 mL) at 0° C. was added pyridine (49 μL, 0.61 mmol) followed by bromoacetylbromide (35 μL, 0.41 mmol). The reaction mixture was stirred at 0° C. for 30 min and at room temperature for another 2.5 h. The reaction mixture was diluted with CH2Cl2, washed with aqueous 1N HCl solution, saturated NaHCO3 solution, and saturated NaCl solution, then dried over MgSO4, filtered and concentrated. The crude product was purified by flash chromatography on silica gel using a gradient of 0-10% MeOH in CH2Cl2 as eluant to provide bromide 28 as a clear yellow oil (175 mg, 3.11×10−4 mol, 76%). 1H NMR (400 MHz, CDCl3) δ 2.72 (tt, J=23.9, 6.2 Hz, 1H), 3.26 (dt, J=16.3, 6.1 Hz, 2H), 4.02 (s, 2H), 4.48-4.62 (m, 8H), 5.20-5.24 (m, 4H), 5.29-5.35 (m, 4H), 5.83-5.94 (m, 4H), 7.25-7.28 (m, 2H), 7.42-7.46 (m, 2H), 8.11 (bs, 1H).

Provenance & Evidence