In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Catalysis based on C-I···π halogen bonds: electrophilic activation of 2-alkenylindoles by cationic halogen-bond donors for [4+2] cycloadditions, published in 2019, which mentions a compound: 21778-81-4, mainly applied to alkenylindole iodoimidazolium triflate catalyst diastereoselective cycloaddition; indolyl tetrahydrocarbazole preparation; cycloaddition; density-functional calculations; halogen bonding; heterocycles; noncovalent bonds, Related Products of 21778-81-4.
Homo- and cross-[4+2] cycloadditions of 2-alkenylindoles catalyzed by cationic halogen-bond donors were developed. Under mild reaction conditions, 3-indolyl-substituted tetrahydrocarbazole derivatives were obtained in good to excellent yields. Exptl. and quantum calculation studies revealed that the electrophilic activation of 2-alkenylindoles was achieved by C-I···π halogen bonds.
Here is a brief introduction to this compound(21778-81-4)Related Products of 21778-81-4, if you want to know about other compounds related to this compound(21778-81-4), you can read my other articles.
Reference:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem