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ChemInform Abstract: Novel Rhodium-Catalyzed Cyclic Carbonylation of 2- Phenylethynylbenzoates Leading to Indeno(1,2-c)isocoumarin.

✍ Scribed by T. SUGIOKA; E. YONEDA; K. ONITSUKA; S.-W. ZHANG; S. TAKAHASHI

Publisher: John Wiley and Sons
Year: 2010
Weight: 29 KB
Volume: 28
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199742127

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✦ Synopsis

Novel Rhodium-Catalyzed Cyclic Carbonylation of 2-Phenylethynylbenzoates Leading to Indeno(1,2-c)isocoumarin. -Pentaethynylbenzoates (I) having a neighboring ester group undergo simultaneous carbonylation of the acetylene, C-H bond activation of the phenyl group and C-O bond fission of the ester group upon treatment with carbon monoxide and Rh6(CO)16 as a catalyst, to give coumarin derivative (III) and the hydrogenated products

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