Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphate → tert-butyl-4-(N-{4-[4-(methylamino)-3-nitrophenoxy]-2-pyridyl}carbamoyl)piperidinecarboxylate

Participants

Reaction Steps

To a mixture of 1-(tert-butoxy)carbonylpiperidine-4-carboxylic acid (1 eq) in N,N-dimethyl formamide and N,N-disopropylethylamine (4 eq) was added BOP (2 eq) and the mixture was stirred at ambient temperature until homogeneous. To it was added [4-(2-amino(4-pyridyloxy))-2-nitrophenyl]methylamine (1 eq) and the resulting mixture was stirred at 60° C. for 16 h. The reaction mixture was then concentrated and partitioned between ethyl acetate and water. The organic layer was dried over sodium sulfate and the resulting tert-butyl-4-(N-{4-[4-(methylamino)-3-nitrophenoxy]-2-pyridyl}carbamoyl)piperidinecarboxylate was purified by silica gel chromatography. MS: MH+=472.2.

Provenance & Evidence