Hedidi, Madani published the artcileSynthesis of C,N’-linked bis-heterocycles using a deprotometalation-iodination-N-arylation sequence and evaluation of their antiproliferative activity in melanoma cells, Application In Synthesis of 69626-75-1, the publication is Bioorganic & Medicinal Chemistry (2014), 22(13), 3498-3507, database is CAplus and MEDLINE.
Benzothiophene, benzofuran, benzothiazole, and benzoxazole were deprotometalated using the lithium-zinc combination prepared from ZnCl2.TMEDA (TMEDA = N,N,N’,N’-tetramethylethylenediamine, 1 equiv) and lithium 2,2,6,6-tetramethylpiperidide (LiTMP, 3 equiv). Subsequent interception of the 2-metalated derivatives using iodine as electrophile led to the iodides in 81%, 82%, 67%, and 42% yields, resp. These yields are higher (10% more) than those obtained using ZnCl2.TMEDA (0.5 equiv) and LiTMP (1.5 equiv), except in the case of benzoxazole (10% less). The crude iodides were involved in the N-arylation of pyrrole, indole, carbazole, pyrazole, indazole, imidazole, and benzimidazole in the presence of Cu (0.2 equiv) and Cs2CO3 (2 equiv), and using acetonitrile as solvent (no other ligand) to provide after 24 h reflux the expected N-arylated azoles in yields ranging from 33% to 81%. Using benzotriazole also led to N-arylation products, but in lower 34%, 39%, 36%, and 6% yields, resp. A further study with this azole showed the impact of 2,2,6,6-tetramethylpiperidine on the N-arylation yields. Most of the C,N’-linked bis-heterocycles thus synthesized (in particular those containing benzimidazole) induced a high growth inhibition of A2058 melanoma cells after a 72 h treatment at 10-5 M.
Bioorganic & Medicinal Chemistry published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Application In Synthesis of 69626-75-1.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem