Journal
ORGANIC LETTERS
Volume 12, Issue 13, Pages 2948-2950Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol100947p
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- Ministry of Education, Culture, Sports, Science, and Technology of Japan
- Grants-in-Aid for Scientific Research [22245017] Funding Source: KAKEN
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By heating aryl aldehydes with catalytic amounts of a rhenium complex, ReBr(CO)(5), and N-phenylacetamide in toluene, indenone derivatives are obtained in good to excellent yields. This reaction proceeds via (1) the formation of an isobenzofuran derivative by the insertion of an aldehyde into the C-H bond of another aldehyde (C-H bond activation) and successive intramolecular nucleophilic cyclization, (2) nucleophilic addition of the formed isobenzofuran derivative to the third aldehyde, (3) isomerization, and (4) intramolecular aldol condensation.
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