Abstract
Reactions of benzaldehydes with excess N,N-dimethylacetamide at 140 °C in the presence of diethyl carbonate as dehydrating agent and a base gave (E)-N,N-dimethylcinnamamides in good yields. If hydroxybenzaldehydes are used as substrates the reaction is accompanied by alkylation.
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We are grateful to the Grant Agency of the Czech Republic, projects No. 203/07/P248, 104/09/0829 and Ministry of Education, Youth and Sports of the Czech Republic MSM 0021627501 and MSM 0021627502 for financial support.
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Weidlich, T., Prokeš, L., Růžička, A. et al. Condensation of aromatic aldehydes with N,N-dimethylacetamide in presence of dialkyl carbonates as dehydrating agents. Monatsh Chem 141, 205–211 (2010). https://doi.org/10.1007/s00706-009-0248-x
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DOI: https://doi.org/10.1007/s00706-009-0248-x