Pyridine‐N‐oxide: An Efficient Organocatalyst for Ring‐Opening Reactions of Aziridines with Aryl Thiols

Abstract Pyridine‐ N ‐oxide serves as an efficient catalyst for the ring‐opening reactions of N ‐tosylaziridines with various aryl thiols under mild conditions. This transformation is highly effective, which gives rise to the corresponding β ‐amino sulfides in good to excellent yields.