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ORGANIC CHEMISTRY FRONTIERS
Volume -, Issue -, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3qo01941a
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In this study, a Lewis acid-catalyzed tandem reaction was developed for the facile construction of the thiophene ring using ketene 1,3-dithietanes as sulfur-containing synthons. The reaction involved nucleophilic addition/C-S cleavage/intramolecular annulation steps, and showed good functional group tolerance and mild reaction conditions. The possible mechanisms were proposed.
A Lewis acid-catalyzed tandem nucleophilic addition/C-S cleavage/intramolecular annulation of ketene 1,3-dithietanes with aldehydes and photo-induced cycloaddition of ketene 1,3-dithietanes with alkynes were developed in this work. The readily available ketene 1,3-dithietanes were demonstrated as promising sulfur-containing synthons for the facile construction of the thiophene ring. Moreover, these processes feature simple operation, good functional group tolerance and mild reaction conditions. Also, the possible mechanisms are proposed in this study.
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