反应详情

The procedure of Example 4, step (b) was followed using 460 mg (1.81 mmol) of 1-(5-chloro-2-nitro-phenyl)-4-methyl-piperidine (as prepared in the Example 12, step (a)) and 3.12 g (36.2 mmol) of piperazine for 24 h to afford, after chromatography on a 20-g silica SPE column with 0-10% MeOH-dichloromethane, 518 mg (94%) of the title compound as an orange resin: Mass spectrum (ESI, m/z): Calcd. for C16H24N4O2, 305.2 (M+H), found 305.1.

1. customto afford