1: 30 percent / Zn, HCl / ethanol / 50 °C 2: 1.) triethylamine 2.)phosphoroxychloride / 1.) dichloromethane, 0 grad C, 2 h 2.) 3 h, reflux View Scheme

triethylamine; trichlorophosphate 1.) dichloromethane, 0 grad C, 2 h 2.) 3 h, reflux; Yield given. Multistep reaction;