1: 36 percent / hydrazine hydrate / methanol / Ambient temperature 2: isopentyl nitrite 3: 46 percent / dimethylformamide / 4 °C 4: 74 percent / thioanisole, trifluoroacetic acid / 1 h / Ambient temperature View Scheme

1: 36 percent / hydrazine hydrate / methanol / Ambient temperature 2: isopentyl nitrite 3: 53 percent / dimethylformamide / 4 °C 4: 79 percent / anisole, trifluoroacetic acid / 1 h / Ambient temperature View Scheme

1: 36 percent / hydrazine hydrate / methanol / Ambient temperature 2: isopentyl nitrite 3: 46 percent / dimethylformamide / 4 °C View Scheme