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Features of Acetal Interchange of 1,1-Dialkoxyalkanes with 1,2-Propylene Glycol in Neutral Solutions

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Abstract

Reactions fo 1,1-dimethoxymethane, 1,1-dimethoxyethane, and 1,1-dimethoxypropane with 1,2-propylene glycol at 25°C in neutral solutions were studied by 13C NMR spectroscopy. Under these conditions, 1,1-dimethoxymethane does not react with the glycol. Only the primary OH group of the glycol participates in the acetal interchange. The reactions of 1,1-dimethoxyethane and 1,1-dimethoxypropane with the glycol, along with the linear acetals, yielded 2-alkyl-4-methyl-1,3-dioxolanes. The product ratio depends on the molar ratio 1,1-dialkoxyalkane : glycol. In the system 1,1-dimethoxypropane-1,2-propylene glycol, the equilibrium concentration of the cyclic acetal slightly increases with temperature in the range 25-80°C.

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Authors and Affiliations

  1. Dzerzhinsk Branch, Nizhni Novgorod State Technical University, Dzerzhinsk, Russia

    A. L. Balashov, V. L. Krasnov, S. M. Danov & A. Yu. Chernov

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  1. A. L. Balashov
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  2. V. L. Krasnov
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  3. S. M. Danov
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  4. A. Yu. Chernov
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Balashov, A.L., Krasnov, V.L., Danov, S.M. et al. Features of Acetal Interchange of 1,1-Dialkoxyalkanes with 1,2-Propylene Glycol in Neutral Solutions. Russian Journal of General Chemistry 71, 752–755 (2001). https://doi.org/10.1023/A:1012361419351

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  • DOI: https://doi.org/10.1023/A:1012361419351

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