tetraethylammonium bromide in hydrogenchloride; anhydrous xylene; isopropyl alcohol

1: 2,2-bis(hydroxymethyl)-1,3-propanediol With triethylamine; phosphorus trichoride in toluene T=5°C; 1 h; 2: 2,4-di-tert-butylphenol in toluene 5 h; Reflux;