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oai:riubu.ubu.es:10259/51772022-05-20T13:23:34Zcom_10259_3593com_10259_5086com_10259_2604col_10259_3594

Cabrera Lobera, Natalia fd559235-95ad-44ba-aa23-51e48164998e 500 Velasco Pérez, Noelia 572 500 Sanz Díez, Roberto 531 500 Fernández Rodríguez, Manuel A. 174 500 2019-11-13T08:45:15Z 2019-11-13T08:45:15Z 2019-08 0040-4020 http://hdl.handle.net/10259/5177 10.1016/j.tet.2019.05.023 10.1016/j.tet.2019.05.023 A practical and environmentally benign Brønsted acid−catalyzed protocol for the preparation of all-carbon tetrasubstituted allenes, consisting in the direct SNˈ addition of tri- or dimethoxy arenes or allyltrimethylsilane to tertiary propargylic alcohols, has been developed. In addition, a straightforward synthesis of densely substituted 2H-chromenes by metal-free tandem allenylation/heterocyclization reaction of methoxyphenols and tertiary alkynols is presented. Junta de Castilla y León and FEDER (BU291P18) and Ministerio de Economía y Competitividad (MINECO) and FEDER (CTQ2016-75023-C2-1-P) application/pdf eng Elsevier Tetrahedron. 2019, V. 75, n. 31, p. 4071-4080 https://doi.org/10.1016/j.tet.2019.05.023 info:eu-repo/grantAgreement/JCyL/BU291P18 info:eu-repo/grantAgreement/MINECO/CTQ2016-75023-C2-1-P http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional info:eu-repo/semantics/openAccess Allenes Brønsted acid catalysis Propargylic alcohols 2H-chromenes Nucleophilic substitution Química orgánica Chemistry, Organic Brønsted acid−catalyzed synthesis of tetrasubstituted allenes and polysubstituted 2H-chromenes from tertiary propargylic alcohols info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion TEXT Cabrera-tetrahedron.pdf.txt Cabrera-tetrahedron.pdf.txt Extracted text text/plain 63274 https://riubu.ubu.es/bitstream/10259/5177/5/Cabrera-tetrahedron.pdf.txt cddaf11b89dadc1a6587bf7d0d624a7c MD5 5 THUMBNAIL Cabrera-tetrahedron.pdf.jpg Cabrera-tetrahedron.pdf.jpg IM Thumbnail image/jpeg 4440 https://riubu.ubu.es/bitstream/10259/5177/4/Cabrera-tetrahedron.pdf.jpg ce786a6b854ab38bd96b9544597cddec MD5 4 Cabrera-tetrahedron_2019.pdf.jpg Cabrera-tetrahedron_2019.pdf.jpg IM Thumbnail image/jpeg 4440 https://riubu.ubu.es/bitstream/10259/5177/6/Cabrera-tetrahedron_2019.pdf.jpg ce786a6b854ab38bd96b9544597cddec MD5 6 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/5177/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 805 https://riubu.ubu.es/bitstream/10259/5177/2/license_rdf 4460e5956bc1d1639be9ae6146a50347 MD5 2 ORIGINAL Cabrera-tetrahedron_2019.pdf Cabrera-tetrahedron_2019.pdf application/pdf 746490 https://riubu.ubu.es/bitstream/10259/5177/1/Cabrera-tetrahedron_2019.pdf 952ce58155ef620b411022ab3d94caf3 MD5 1 10259/5177 oai:riubu.ubu.es:10259/5177 2022-05-20 15:23:34.016 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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