反应条件
1.1: potassium tert-butylate / N,N-dimethyl-formamide / 0.5 h / 20 °C 1.2: 2 h / 80 °C 2.1: dichloromethane / 16 h / 20 °C 3.1: trifluoroacetic acid; triethylsilane / dichloromethane / 16 h / 50 °C 4.1: HATU; N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / 16 h / 20 °C View Scheme
