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Piperidinium Acetate-Catalyzed the Synthisis of 2,3-Disubstituted Chroman-4-one and 2,2-Disubstituted Benzofuran-3-one Derivatives
2016
Youji huaxue
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A piperidinium acetate-catalyzed method was developed for the Knoevenagel and O-Micheal cascade reaction of o-hydroxyphenyl-β-diketoes with different series of aldehydes. In the presence of piperidinium acetate, sixteen 2,3-disubstituted chroman-4-ones and nine 2,2-disubstituted benzofuran-3-ones were obtained in moderate to good yields, and the cascade reaction displayed better substrate adaptability. Moreover, the reaction has the following features: a convenient and simple path, mild reaction conditions and a cheap catalyst.
doi:10.6023/cjoc201510014
fatcat:y3hyygjipbgp3grkyrbwh4nzla