Diversity‐Oriented Synthesis of Furo[3,2‐c]coumarins and Benzofuranyl Chromenones through Chemoselective Acylation/Wittig Reaction

A highly efficient and chemoselective one‐pot protocol for the diversity‐oriented synthesis of two types of coumarin‐based formal cross‐coupling adducts, furo[3,2‐c]coumarins and 3‐benzofuranyl chromenones, is described. Key attributes of the methodology are an initial chemoselective acylation of fu...

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Published inAngewandte Chemie Vol. 130; no. 6; pp. 1684 - 1688
Main Authors Yang, Shu‐Mei, Wang, Chein‐Yi, Lin, Chun‐Kai, Karanam, Praneeth, Reddy, Ganapuram Madhusudhan, Tsai, Yi‐Ling, Lin, Wenwei
Format Journal Article
LanguageEnglish
German
Published Weinheim Wiley Subscription Services, Inc 05.02.2018
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ISSN0044-8249
1521-3757
DOI10.1002/ange.201711524

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Summary:A highly efficient and chemoselective one‐pot protocol for the diversity‐oriented synthesis of two types of coumarin‐based formal cross‐coupling adducts, furo[3,2‐c]coumarins and 3‐benzofuranyl chromenones, is described. Key attributes of the methodology are an initial chemoselective acylation of functionalized phosphorus zwitterions and a subsequent chemoselective intramolecular Wittig reaction that preferentially resulted in one of the two coumarin derivatives in high yield, depending on relative reactivities and the addition sequence of the acylating agents. Sie haben die Wahl: Die diversitätsorientierte Synthese von zwei Arten von Cumarin‐abgleiteten Polyheterocyclen, Furo[3,2‐c]cumarine und 3‐Benzofuranylchromenone, gelingt durch chemoselektive Acylierung von Phosphor‐Zwitterionen und anschließende chemoselektive intramolekulare Wittig‐Reaktion. Die sorgfältige Wahl der Acylierungsreagentien und der Reihenfolge ihrer Zugabe führt zu unterschiedlichen Reaktivitäten in der Wittig‐Reaktion.
Bibliography:These authors contributed equally.
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ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201711524