potassium hydroxide in acetonitrile 14 h; Ambient temperature;

1: 76 percent / xylene / 0.5 h / Heating 2: 88 percent / methane sulfonyl azide, Et3N / acetonitrile / 3 h / Ambient temperature 3: 78 percent / 8 percent KOH / acetonitrile / 14 h / Ambient temperature View Scheme

1: 88 percent / methane sulfonyl azide, Et3N / acetonitrile / 3 h / Ambient temperature 2: 78 percent / 8 percent KOH / acetonitrile / 14 h / Ambient temperature View Scheme