So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Marquise, Nada; Harford, Philip J.; Chevallier, Floris; Roisnel, Thierry; Wheatley, Andrew E. H.; Gros, Philippe C.; Mongin, Florence researched the compound: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5 ).Quality Control of Tricyclohexylphosphonium tetrafluoroborate.They published the article 《Efficient two-step access to azafluorenones and related compounds》 about this compound( cas:58656-04-5 ) in Tetrahedron Letters. Keywords: crystal structure azafluorenone preparation. We’ll tell you more about this compound (cas:58656-04-5).
Crystals of a lithiocuprate prepared from copper(I) chloride and lithium 2,2,6,6-tetramethylpiperidide (2 equiv) were isolated and analyzed by x-ray diffraction as (TMP)2Cu(Cl)Li2·THF. The observation of this species is consistent with its having a role in deprotocupration-aroylation. Ph pyridyl ketones, Ph quinolyl ketones, and Ph thienyl ketones were prepared in THF using the lithiocuprate and aroyl chlorides as electrophiles. Diaryl ketones bearing a chloro group at the 2 position (of a pyridyl or Ph group) thus synthesized were next converted through palladium-catalyzed ring closure to polycycles of the 5H-indeno[1,2-b]pyridin-5-one, 11H-indeno[1,2-b]quinolin-11-one, 9H-indeno[2,1-c]pyridin-9-one, and 8H-indeno[2,1-b]thiophen-8-one families.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem