How is 2,2-Diethoxy-1-phenylethanone (CAS: 6175-45-7) typically synthesized?

2,2-Diethoxy-1-phenylethanone (CAS: 6175-45-7) is typically synthesized by the condensation of 1-phenylethanoic acid with diethyl oxalate in the presence of a catalytic amount of p-toluenesulfonic acid. The reaction is carried out in anhydrous conditions to ensure high selectivity and yield. The process involves mild heating and stirring to facilitate the reaction, leading to a product with a yield of about 80-90%.