Four-membered Rings with One Sulfur and One Nitrogen Atom

摘要: In the last decade, interesting advances have been made in synthesis of strained four-membered ring systems. particular, there is still new heterocyclic chemistry being continuously reported, especially systems containing both one sulfur and nitrogen atom. During few years, emergence asymmetric approaches has increased significance these hetrocycles. β-Sultams, which may be regarded as analogues β-lactams, dominate this field interest terms number publications but exciting emanating from different research groups reported area other thiazete thiazetidine families.