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Synthesis of (6,7-dichlorononafluoro-5,6,7,8-tetrahydronaphthalen-2-yl)acetic acid and its transformation into perfluorinated 2-methylnaphthalene and 6-methyl-1,4-dihydronaphthalene

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Abstract

2,3-Dichlorodecafluorotetralin reacted with ethyl cyanoacetate to give ethyl 2-cyano-2-(6,7-dichlorononafluoro-5,6,7,8-tetrahydronaphthalen-2-yl)acetate which was hydrolyzed to (6,7-dichlorononafluoro-5,6,7,8-tetrahydronaphthalen-2-yl)acetic acid. The latter was treated with PCl5 on heating to obtain 2,2-dichloro-(6,7-dichlorononafluoro-5,6,7,8-tetrahydronaphthalen-2-yl)acetyl chloride which was converted to 2,3-dichlorononafluoro-6-trifluoromethyl-1,2,3,4-tetrahydronaphthalene by the action of SbF5. The reduction of 2,3-dichlorononafluoro-6-trifluoromethyl-1,2,3,4-tetrahydronaphthalene with zinc in 1,4-dioxane gave perfluoro-6-methyl-1,4-dihydronaphthalene, and in DMF, perfluoro-2-methylnaphthalene.

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Correspondence to V. M. Karpov.

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Original Russian Text © V.R. Sinyakov, T.V. Mezhenkova, V.M. Karpov, Ya.V. Zonov, 2017, published in Zhurnal Organicheskoi Khimii, 2017, Vol. 53, No. 12, pp. 1786–1791.

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Sinyakov, V.R., Mezhenkova, T.V., Karpov, V.M. et al. Synthesis of (6,7-dichlorononafluoro-5,6,7,8-tetrahydronaphthalen-2-yl)acetic acid and its transformation into perfluorinated 2-methylnaphthalene and 6-methyl-1,4-dihydronaphthalene. Russ J Org Chem 53, 1822–1827 (2017). https://doi.org/10.1134/S1070428017120065

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  • DOI: https://doi.org/10.1134/S1070428017120065

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