1: 3-benzyl-5-(2-hydroxyethyl)-4-methylthiazolium chloride / Ambient temperature 2: 65 percent / Ac2O, HCl / 48 h / Heating 3: 1.) POCl3 / 1.) RT, 10 min, 2.) CH2Cl2, RT, 48 h View Scheme

1: 65 percent / Ac2O, HCl / 48 h / Heating 2: 1.) POCl3 / 1.) RT, 10 min, 2.) CH2Cl2, RT, 48 h View Scheme

trichlorophosphate 1.) RT, 10 min, 2.) CH2Cl2, RT, 48 h; Yield given. Multistep reaction;