SCHEDULED MAINTENANCE
The regiospecific metal–ammonia reductions of both cis-8-hydroxy-7,11,11-trimethylspiro[5·5]undeca-1,4-dien-3-one (2a) and its metal alkoxides (2b) and (2c) could be achieved as a result of the proximity of the hydroxy-group to afford t-8-hydroxy-t-7, 11, 11-trimethyl-(6rC1)-spiro[5·5]undec-1-en-3-one (4) in high yield.
C. Iwata, K. Miyashita, Y. Ida and M. Yamada, J. Chem. Soc., Chem. Commun., 1981, 461 DOI: 10.1039/C39810000461
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