Iron(iii)-induced tandem Nazarov cyclization–rearrangement of α-(trimethylsilylmethyl)divinyl ketone. Synthesis of the bicyclo[4.3.0]nonane ring system via spiro[4.4]nonane

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Chiaki Kuroda, Hiroshi Sumiya, Atsushi Murase and Akira Koito


Abstract

6-Methylbicyclo[4.3.0]non-8-en-7-one was synthesized by FeCl3-induced tandem Nazarov cyclization–rearrangement of 4-cyclopentylidene-5-trimethylsilylpent-1-en-3-one, via 7-methyl-1-methylenespiro[4.4]nonan-2-one as intermediate.


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