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

By Lewis Wilkins, Hugh Hamilton, Benson Kariuki, Stephen Hashmi, Max Hansmann and Rebecca Melen

Abstract

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

Topics: QD Chemistry
Publisher: Royal Society of Chemistry
Year: 2015
DOI identifier: 10.1039/C5DT03340C
OAI identifier: oai:http://orca.cf.ac.uk:77032
Provided by: ORCA
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