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Summary[14C]Quincetone was prepared from Ba14CO3 with a radiochemical yield of 21.3%. Ba14CO3, as starting material, was acidified to release 14CO2, which reacted with PhMgBr to [14C]benzoic acid. [14C]Benzoic acid was reduced with LiAlH4 to [14C]benzyl alcohol, and oxidized with CrO3 to [14C]benzaldehyde. In the last reaction, [14C]benzaldehyde was condensed with 3-methyl-2-acetyl-quinoxaline-1,4-dioxide...
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