Commercial Processes for Antibiotic Ferm
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Dr. R. Kreutzfeldt
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Article
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1967
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John Wiley and Sons
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English
โ 235 KB
๐ 1 views
Both half-molecules of 2,2'-bi-(1,4-naphthoquinone) react with diazomethane in a cycloaddition yielding the adduct ( I ) 111. This compound can be stabilized in three ways, each of which involve attack on the bonds from C-9a and C-9'a and aromatization: