Lewis acid-base 1,2-addition reactions: synthesis of pyrylium borates from en-ynoate precursors

Treatment of methyl (Z)-2-alken-4-ynoates with the strong Lewis acid tris(pentafluorophenyl) borane, B(C6F5)3, yield substituted zwitterionic pyrylium borate species via an intramolecular 6-endo-dig cyclisation reaction.

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Bibliographic Details
Published inDalton transactions : an international journal of inorganic chemistry Vol. 45; no. 14; pp. 5929 - 5932
Main Authors Wilkins, Lewis C, Hamilton, Hugh B, Kariuki, Benson M, Hashmi, A Stephen K, Hansmann, Max M, Melen, Rebecca L
Format Journal Article
LanguageEnglish
Published England 01.01.2016
Subjects
Boranes
Borates
Lewis acid
Precursors
Synthesis (chemistry)
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Summary:Treatment of methyl (Z)-2-alken-4-ynoates with the strong Lewis acid tris(pentafluorophenyl) borane, B(C6F5)3, yield substituted zwitterionic pyrylium borate species via an intramolecular 6-endo-dig cyclisation reaction.
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ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt03340c