反应详情

Intermediate 88 (13.4 g, 38.42 mmol) was dissolved in 200 ml DCM and N-methyl piperazine (8.52 ml, 76.83 mmol) was added followed by DIPEA (26.77 ml, 153.67 mmol) and TBTU (18.5 g, 57.63 mmol). After 16 h stirring at RT, the solution was evaporated to dryness and purified by silica gel chromatography. Yield: 13.05 g, 79%.

1. customthe solution was evaporated to dryness
2. custompurified by silica gel chromatography