反应条件
1: pyridine / 16 h / 17 °C 2: pyridine / 0 deg C, 30 min and 2 h, room t. 3: 84 percent / 1.) DBU, molecular sieves / CH2Cl2 / 20 h / 30 - 35 °C 4: LiN3, molecular sieves / dimethylformamide / 1 h / 150 °C 5: TsOH / CH2Cl2; methanol / 6 h / Ambient temperature View Scheme
参考文献
Helvetica Chimica Acta, , vol. 79, # 2 p. 426 - 438