Spirans with four aromatic radicals on the spiro carbon atom1

RG Clarkson, M Gomberg

文献索引：Clarkson; Gomberg Journal of the American Chemical Society, 1930 , vol. 52, p. 2881,2887

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被引用次数: 104

摘要

Dehydrodihydroxyrotenonic Acid Ethyl Ester.-One gram of the acid was boiled for three hours in 10 cc. of 10% alcoholic sulfuric acid. The ester crystallized on cooling and was recrystallized from 95% alcohol. It crystallized in needles melting at 98". The yield was nearly quantitative.