O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate → HCID 74222540, compound

Participants

Reaction Steps

250 mg of 8-[(2,6-difluorobenzyl)oxy]-2-methylimidazo[1,2-a]pyridine-3-carboxylic acid (0.785 mmol), 112 mg of 3-amino-1,1,1-trifluorobutan-2-ol (mixture of four stereoisomers; 0.785 mmol) and 277 mg of TBTU (0.864 mmol) were dissolved in 1.5 ml of dichloromethane, and the mixture was stirred at RT for 48 h. The reaction mixture was concentrated and the residue was taken up in methanol and purified by preparative HPLC (Method 7). This gave 186 mg (53% of theory) of the title compound, which was separated by preparative HPLC on a chiral phase.

Provenance & Evidence