条件:Stage #1: With hydrogenchloride In water at 50℃; for 0.50 h; Stage #2: With sodium nitrite In water at 0℃; for 2 h; Stage #3: With tetrafluoroboric acid In water for 1 h;
收率:26g(纯度>98.5%,3步产率85%,总收率69.4%)
参考文献:Patent: CN103787846, 2016, B. Location in patent: Paragraph 0042; 0044