In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Catalytic Direct Arylation with Aryl Chlorides, Bromides, and Iodides: Intramolecular Studies Leading to New Intermolecular Reactions, published in 2006-01-18, which mentions a compound: 58656-04-5, Name is Tricyclohexylphosphonium tetrafluoroborate, Molecular C18H34BF4P, Product Details of 58656-04-5.
A catalyst for the intramol. direct arylation of a broad range of simple and heterocyclic arenes with aryl iodides, bromides, and chlorides has been developed. These reactions occur in excellent yield and are highly selective. Studies with aryl iodides substrates revealed that catalyst poisoning occurs due to the accumulation of iodide in the reaction media. This can be overcome by the addition of silver salts which also permits these reactions to occur at lower temperature The utility of the methodol. is illustrated by a rapid synthesis of a carbazole natural product and by the synthesis of sterically encumbered tetra-ortho-substituted biaryls via ring-opening reactions of the direct arylation products. Mechanistic investigations have provided insight into the catalyst’s mode of action and show the presence of a kinetically significant C-H bond cleavage in palladium-catalyzed direct arylation of simple arenes. Knowledge garnered from these studies has led to the development of new intermol. arylation reactions with previously inaccessible arenes, opening the door for the development of other new direct arylation processes.
The article 《Catalytic Direct Arylation with Aryl Chlorides, Bromides, and Iodides: Intramolecular Studies Leading to New Intermolecular Reactions》 also mentions many details about this compound(58656-04-5)Product Details of 58656-04-5, you can pay attention to it, because details determine success or failure
Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem