Abstract
The three-component condensation of isobutyraldehyde, 3,4-dimethoxyphenylacetonitrile, and p-methylanisole or anisole in the presence of concentrated sulfuric acid affords neospiroenone systems.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1222–1227, June, 2010.
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Shklyaev, Y.V., El’tsov, M.A., Rozhkova, Y.S. et al. Neospiroenones. Synthesis of 10,11-dimethoxy-1,6,6-trimethyl-5,6,8,12b-tetrahydrobenzo[d,f]indol-4(3H)-one and 10,11-dimethoxy-6,6-dimethyl- 1,5,6,12b-tetrahydrobenzo[d,f]indol-2(8H)-one. Russ Chem Bull 59, 1248–1253 (2010). https://doi.org/10.1007/s11172-010-0229-6
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DOI: https://doi.org/10.1007/s11172-010-0229-6