Benzo selenophenes synthesis

Murphy J (2000) Benzo[ ]selenophenes. In Houben-Weil science of synthesis. Thieme, Stuttgart, chap 10.7, p 265... 

This methodology can be extended to the synthesis of disubstituted benzo[ ]selenophenes 54 from the selenide 53, which was readily accessible Irom o-iodoaniline in three steps, by using platinum catalyst (Scheme 27.21) [26]. 

The orf/zo-alkenylarylzinc reagent obtained by the migratory arylzincation serves as a precursor to benzo[ijchalcogenophenes such as benzo[fe]thiophenes and benzo[h]selenophenes (Scheme 10.9) [28]. Treatment of the zinc intermediate with sulfur powder in the presence of Cul allows one-pot synthesis of a benzo[h]thiophene derivative (route A). Alternatively, the zinc intermediate is quenched with iodine to give ortho-alkenylaryl iodide, which is then subjected to copper-catalyzed reaction with sulfur or selenium powder to furnish the corresponding benzo[i]thiophene or benzo[(i]selenophene derivative (route B). Collectively, these approaches allow for expedient synthesis of functionalized benzo[h]thiophenes and benzo[()]selenophenes, many of which are difficult to... 

Benzoselenolo[2,3-ii]benzoselenophenes synthesis, 4, 116, 1078 Benzoselenolopyrylium cations oxidative ring contraction, 4, 969 [l]Benzoselenolo[3,4-ii][l,2,3]selenadiazoles synthesis, 6, 354 Benzo[h]selenophene, 2-acetyl-synthesis, 4, 966 Benzo[h]selenophene, 2-bromo-acylation, 4, 948... 

Benzo[h]selenophene, 3-bromo-2-lithio-synthesis, 4, 956 Benzo[h]selenophene, 3-chloro-synthesis, 4, 116... 

Benzo[h]seienophene, 2,3-dihydro-2-methyl-synthesis, 4, 961 Benzo[h]selenophene, 3-halo-2-substituted synthesis, 4, 966... 

Ben2o[fa]selenophene, 2-hydroxy-tautomerism, 4, 945 Benzo[h]selenophene, 3-hydroxy-tautomerism, 4, 37, 945 Benzo[h]selenophene, 4-hydroxy-synthesis, 4, 969... 

Benzo[h]selenophene, 7-hydroxy-synthesis, 4, 969 Benzo[h]selenophene, 3-lithio-synthesis, 4, 955 Benzo[h]selenophene, 2-methyl-mass spectra, 4, 942 synthesis, 4, 961 Benzo[h]selenophene, 3-methyl-mass spectra, 4, 942 synthesis, 4, 956... 

Benzo[h]selenophene-2-carboxylic acids ethyl ester synthesis, 4, 959 reactions, 4, 952 synthesis, 4, 95... 

Selenation of the 1,4-dicarbonyl precursor 89 using the reagent (Me2Al)2Se gave the benzo[c]selenophene derivative 90 in good yield <06TL2887>. The synthesis and structural studies of 4,7-dimethoxybenzo[c]tellurophene have also been reported <06AG(E)5666>. 

Benzo[b]selenophene, 3-methyl-mass spectra, 4, 942 synthesis, 4, 956... 

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