A convenient method for the N-formylation of amines at room temperature using TiO2-P25 or sulfated titania

▶ N-formylation of amines is a useful reaction in synthetic organic chemistry. ▶ TiO2 possesses a unique type of surface involving both redox and acid-base sites. ▶ Sulfated titania has more acidic sites and so more efficient than TiO2-P25. ▶ Easy product isolation and catalyst reusability make this reaction eco-friendly.