Eco-friendly and efficient catalyst-free synthesis of <i>N</i>-sulfonylimines from sulfonamides and aldehydes: crucial role of Al<sub>2</sub>O<sub>3</sub> as a reusable dehydrating agent
A green synthesis of N-sulfonylimines was developed involving the straightforward condensation of sulfonamides with aldehydes under green and catalyst-free conditions, mediated by neutral Al2O3 as an efficient and reusable dehydrating agent.