Hexafluorophosphate → 2-(6-Benzyloxy-benzoimidazol-1-yl)-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid amide

Participants

Reaction Steps

To a mixture of 3.3 g (7.16 mmole) of 2-(6-benzyloxy-benzoimidazol-1-yl)-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid (I.25b), 20 mL of dimethylformamide and 3.26 g (8.59 mmole) of 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium, 3-oxide, hexafluorophosphate(1-) (1:1) was added 0.759 g (14.52 mmole) of ammonium chloride followed by 3.74 mL (21.48 mmole) of ethyldiisopropylamine. The mixture was stirred at ambient temperature for 1 hour and then diluted with 500 mL of water. The suspension was stirred for 30 minutes. The precipitate was collected by filtration to afford 3.2 g of 2-(6-benzyloxy-benzoimidazol-1-yl)-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid amide as an off-white solid (I.25c).

Provenance & Evidence