GROUP-ASSISTED PURIFICATION CHEMISTRY PRINCIPLES TO ACCESS HIGHLY SUBSTITUTED ZWITTERIONIC FURANS <i>via</i> FAST, CONCISE, AND EFFICIENT ONE-POT THREE-COMPONENT ASSEMBLY
DOI:
https://doi.org/10.1007/5918Ключевые слова:
3-cyanochromones, dialkyl acetylenedicarboxylate, triphenylphosphine, zwitterionic furans, one-pot reaction, three-component reaction.Аннотация
Novel highly substituted zwitterionic furans were generated through the in situ formation of phosphonium salts. Firstly, intermediate salts were obtained via nucleophilic attack of Huisgen zwitterion to 3-cyanochromones. Finally, these intermediate salts underwent a proton migration, intramolecular cyclization, and ring-opening reaction to convert to the target products. The synthesized furans could be easily purified without traditional purification techniques (chromatography and recrystallization).
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Опубликован
2021-03-15
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Оригинальные статьи