Abstract
A procedure was developed for preparing 2,3-dialkyl-substituted succinates by condensation of a succinic acid diester with two isobutyraldehyde molecules, followed by esterification and hydrogenation of the sum of dienes. Diethyl 2,3-diisobutylsuccinate of 75–99% purity was prepared by this procedure in a good yield. The use of the synthesized diethyl 2,3-diisobutylsuccinate as a stereoregulating component of titanium–magnesium catalysts allows synthesis of polypropylene with broad molecular-mass distribution. The catalysts prepared using >95% pure diethyl 2,3-diisobutylsuccinate have the best characteristics and allow preparation of polypropylene with high isotacticity index in a high yield.
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ACKNOWLEDGMENTS
The authors are grateful to the Chemical Research Center for Shared Use, Siberian Branch, Russian Academy of Sciences for performing spectral and analytical measurements.
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I.V. Nechepurenko developed and implemented schemes for preparing organic compounds, interpreted the GC–MS patterns and NMR spectra, and wrote the manuscript; I.Ya. Mainagashev synthesized the organic compounds; A.A. Barabanov synthesized, studied, and tested catalyst samples and wrote the manuscript; S.A. Sergeev synthesized the catalysts; G.D. Bukatov developed and optimized the catalysts preparation procedure; V.A. Zakharov formulated tasks on catalysts preparation; M.A. Mats’ko formulated tasks on catalysts preparation and polymerization and wrote the manuscript; K.P. Volcho formulated tasks, developed schemes of the synthesis of organic compounds, and wrote the manuscript; N.F. Salakhutdinov formulated tasks and developed schemes of the synthesis of organic compounds.
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Translated from Zhurnal Prikladnoi Khimii, No. 6, pp. 699–710, January, 2021 https://doi.org/10.31857/S0044461821060037
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Nechepurenko, I.V., Mainagashev, I.Y., Barabanov, A.A. et al. A New Approach to the Synthesis of Diethyl 2,3-Diisobutylsuccinate, a Component of Titanium–Magnesium Catalysts for Propylene Polymerization. Russ J Appl Chem 94, 715–725 (2021). https://doi.org/10.1134/S1070427221060033
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DOI: https://doi.org/10.1134/S1070427221060033