SEARCH Articles Figures Tables 3- Membered rings three heteroatoms 4- Membered rings with three heteroatoms APPLICATIONS OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS Eight-membered Rings containing Three or More Heteroatoms Five-membered heterocycles with three heteroatom Heteroatoms, three-membered ring opening with Peri-Heterocycles with Six-Membered Heteroring and Three Heteroatoms REACTIVITY OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS STRUCTURE OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS SYNTHESIS OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS Seven-membered Rings containing Three or More Heteroatoms Seven-membered heterocycles with three heteroatom Seven-membered rings three heteroatoms Seven-membered systems containing three or more heteroatoms Six-Membered Rings with Three Heteroatoms Six-membered heterocycles with three heteroatom Three heteroatoms Three, Four, and Five-membered Systems with One Heteroatom Three-Membered Rings with One Heteroatom Three-membered Three-membered rings with two heteroatoms