期刊
ORGANIC LETTERS
卷 14, 期 18, 页码 4778-4781出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol3020682
关键词
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资金
- MICINN
- FEDER [CTQ2010-15358, CTQ2009-09949/BQU]
- Junta de Castilla y Leon [BU021A09, GR-172]
- Junta de Castilla y Leon (Consejeria de Educacion)
- Fondo Social Europeo
- MEC [SB2009-0186]
Dihydrobenzo[a]fluorene derivatives have been prepared by a formal intramolecular [3 + 3] cycloaddition of o-alkynylstyrenes bearing a secondary alkyl group at the beta-position of the styrene moiety. The process, catalyzed by a cationic gold(I) complex, involves a 1,2-hydride migration as the key step. 6,11-Dihydro-5H-benzo[a]fluorenes could be obtained from the initially generated 6,6a-dihydro-5H-benzo[a]fluorenes by subsequent heating of the reaction mixture under gold(I) or Bronsted acid catalysis or directly by conducting the reactions at high temperature.
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