Imidazole → (S)-1-t-butyldimethylsilyloxy-2-triphenylmethylamino-3-(1-triphenylmethylimidazol-5-yl)propane

Participants

Reaction Steps

Imidazole (12.269 g, 0.180 mol) and tert-butyldimethylsilyl chloride (TBDMSCl) (20.37 g, 0.135 mol) were added to a solution of the compound (XXI) (56.390 g, 0.0901 mol) in dry DMF (560 ml) under ice cooling, and the mixture was stirred at room temperature for 3.5 hours. The reaction mixture was poured into water, extracted with Et2O, washed with water and a saturated NaCl aqueous solution, then dried over Na2SO4, and concentrated to obtain a light-yellow foamy material (67.602 g). This crude product was purified by silica gel column chromatography (hexane/acetone=5/1) to obtain the objective compound (XX) (58.770 g; yield: 88.1%) as a white foamy material.

Provenance & Evidence