Benzaldehyde(0.049mol) was treated with isopropylthiol(12mL) in the presence of p toluenesulfonic acid (3mmol) to give 84.9% benzaldehyde isopropyl mercaptal.

• 苯甲醛和异丙硫醇在对甲苯磺酸催化下发生反应，合成相应的缩硫醛，产率达84．9%25。