Summary
The condensation has been carried out of 1-decalone (III), 8a-methyl-1-octalone (V), and 3a,4,7,7a-tetrahydro-3,7a-dimethyl-1-indanone (VI) with 1-acetyl-1-cyclohexene. The products were the polycyclic kiketones VII, IX, and XI, which under the conditions of the experiment did not undergo a further intramolecular crotonic condensation.
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Nazarov, I.N., Zavyalov, S.I. Synthesis of polycylic compounds related to steroids XIII. Reaction of carbocyclic ketones with 1-acetyl-1-cyclohexene. Russ Chem Bull 1, 423–426 (1952). https://doi.org/10.1007/BF01171991
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DOI: https://doi.org/10.1007/BF01171991