1: 91 percent / phosphoryl chloride / 3 h / Heating 2: 98 percent / hydrogen/conc. ammonia / 5percent palladium charcoal / methanol 3: 92 percent / propyl nitrite, HCl / ethanol / 2 h / Ambient temperature View Scheme

1: 91 percent / phosphoryl chloride / 3 h / Heating 2: 98 percent / hydrogen/conc. ammonia / 5percent palladium charcoal / methanol 3: 92 percent / propyl nitrite, HCl / ethanol / 2 h / Ambient temperature 4: 80 percent / pyruvic acid, conc. HCl / aq. ethanol / 6 h / Heating View Scheme

trichlorophosphate 3 h; Heating;