Abstract
The interaction of 1,3-dialkyl-2,3-dihydro-1H-benzo[d]imidazol-2-ylidenemethyl cyanides with N-trifluoroacylated acid chlorides gave the desired (3-cyano-2-oxo-3-hetarylpropyl)-2,2,2-trifluoroacetamides that upon detrifluoroacetylation provided the target 2-(5-amino-2,3-dihydro-3-oxopyrrol-4-yl)-1,3-dialkylbenzimidazolium chlorides.
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Alexey Dobrydnev acknowledges Patricia Dobrydneva for a fellowship and technical support.
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Dobrydnev, A.V., Volovenko, Y.M., Turov, A.V. et al. Synthesis of spiro 2-(5-amino-2,3-dihydro-3-oxopyrrol-4-yl)-1,3-dialkylbenzimidazolium chlorides. Monatsh Chem 146, 931–939 (2015). https://doi.org/10.1007/s00706-015-1438-3
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DOI: https://doi.org/10.1007/s00706-015-1438-3