tert-Butyl 4-(4-aminophenyl)piperidine-1-carboxylate → 4-{4-[8-(1-(4-Fluoro-phenyl)-1H-pyrazol-4-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-ylamino]-phenyl}-piperidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

2-Chloro-8-([1-(4-fluoro-phenyl)1H-pyrazol-4-yl]-[1,2,4]triazolo[1,5-a]pyridine was prepared from 8-bromo-2-chloro-[1,2,4]triazolo[1,5-a]pyridine and 1-(4-fluorophenyl)pyrazole-4-boronic acid in a manner analogous to Example 2c (0.45 g, 67%). 280b) 4-{4-[8-(1-(4-Fluoro-phenyl)-1H-pyrazol-4-yl)-[1,2,4]triazolo[1,5-a]pyridine-2-ylamino]-phenyl}-piperidine-1-carboxylic acid tert-butyl ester was prepared from 2-chloro-8-([1-(4-fluoro-phenyl)1H-pyrazol-4-yl]-[1,2,4]triazolo[1,5-a]pyridine and 4-(4-amino-phenyl)-piperidine-1-carboxylic acid tert-butyl ester with 2,2′-bis-dicyclohexylphosphanyl-biphenyl as the ligand in a manner analogous to Example 2d (0.077 g, 23%). MP=176-178° C. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 9.62 (s, 1H), 9.26 (s, 1H), 8.76 (m, 2H), 7.95 (m, 3H), 7.65 (m, 2H), 7.45 (m, 2H), 7.15 (m, 2H), 7.09 (m, 1H), 4.08 (m, 2H), 2.80 (m, 2H), 2.63 (m, 1H), 1.73 (m, 2H), 1.48 (m, 2H), 1.42 (s, 9H). MS=554 (MH)+.

Provenance & Evidence