Triethylamine → 6-Amino-N-(5-(4-fluoro-phenoxy)-thiophen-2-ylmethyl)-nicotinamide

Participants

Reaction Conditions

Reaction Steps

To a solution of C-(5-(4-fluorophenoxy)thiophen-2-yl)methylamine described in Preparation Example 28 (500 mg, 2.24 mmol) and 6-aminonicotinic acid (340 mg, 2.46 mmol) in N,N-dimethylformamide (10 mL) were added benzotriazol-1-yl-tris(dimethylamino)phosphonium hexafluorophosphate (1.1 g, 2.46 mmol) and triethylamine (0.6 mL, 4.48 mmol), and the solution was stirred for 30 minutes at 60° C. Water and ethyl acetate were added to the reaction solution, which was then partitioned, and the organic layer was washed with water three times. The organic layer was passed through a glass filter lined with NH silica gel and silica gel (1:1), and eluted with a mixture solvent of ethyl acetate and methanol (20:1). The solvent was evaporated in vacuo, ethyl acetate and hexane were added to the residue, the generated solid was collected by filtration, and the title compound (560 mg, 1.63 mmol, 72.8%) was obtained as a slightly yellow solid.

Provenance & Evidence