In an article, author is Roger, Julien, once mentioned the application of 583-39-1, Name is 2-Mercaptobenzimidazole, molecular formula is C7H6N2S, molecular weight is 150.2, MDL number is MFCD00466107, category is imidazoles-derivatives. Now introduce a scientific discovery about this category, Name: 2-Mercaptobenzimidazole.
Phosphine-free palladium-catalysed direct 5-arylation of imidazole derivatives at low catalyst loading
The regioselective 5-arylation of imidazole derivatives with aryl bromides using a low loading of a phosphine-free palladium catalyst gives a simple and economic access to the corresponding 5-arylimidazoles. The choice of the base and of the solvent was found to be crucial to form these products in high yields. Using KOAc as the base, DMAc as the solvent and only 0.5-0.01 mol % Pd(OAc)(2) as the catalyst, the target products were obtained in moderate to good yields with a wide variety of aryl bromides. Substituents Such as fluoro, trifluoromethyl, formyl, acetyl, propionyl, ester OF nitrile on the aryl bromide are tolerated. Sterically congested aryl bromides or heteroaryl bromides can also be employed. The nature of the substituents on the imidazole derivative has an important influence on the yields. (C) 2009 Elsevier Ltd. All rights reserved.
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