期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 1, 页码 259-263出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201507794
关键词
conjugation; fluorescence; materials science; oxidation; spirocompounds
资金
- Japan Society for Promotion of Science (JSPS) [25288043]
- World Premier International Research Center Initiative (WPI), MEXT, Japan
- Grants-in-Aid for Scientific Research [25288043, 25286012, 14J04719] Funding Source: KAKEN
A novel FeCl3-mediated oxidative spirocyclization for construction of a new class of di-spirolinked pi-conjugated molecules, dispiro[ fluorene-9,5'-indeno[2,1-a]indene-10',9''fluorene]s (DSFIIFs), has been reported. The combination of FeCl3 with FeO(OH) triggered an unprecedented double one-electron oxidation of difluorenylidene diarylethanes to afford the corresponding dispirocycles in high yields. The highest fluorescence quantum yield was up to 0.94 in solution. This protocol is also applicable to the synthesis of the non-spirolinked dihydroindenoindenes.
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