A SIMPLE AND EFFICIENT SYNTHESIS OF KEY SYNTHETIC INTERMEDIATES OF 4-DEMETHOXYANTHRACYCLINONES, (±)- AND (<i>R</i>)-(−)-7-DEOXY-4-DEMETHOXYDAUNOMYCINONE
作者:Michiyo Suzuki、Teruyo Matsumoto、Rumiko Abe、Yoshikazu Kimura、Shiro Terashima
DOI:10.1246/cl.1985.57
日期:1985.1.5
(±)-2,5,12-Trihydroxy-1,2,3,4-tetrahydronaphthacene-6,11-dione-2-carboxylic acid was found to readily afford the racemic title compound by successive treatments with N,N′-carbonyldiimidazole and methylmagnesium bromide in the presence of trimethylsilyl triflate. The same reaction scheme could also furnish the optically pure title compound from the (R)-carboxylic acid produced by the optical resolution
发现 (±)-2,5,12-Trihydroxy-1,2,3,4-tetrahydronaphthacene-6,11-dione-2- 羧酸通过用 N,N'-连续处理很容易得到外消旋的标题化合物在三甲基甲硅烷基三氟甲磺酸酯存在下羰基二咪唑和甲基溴化镁。相同的反应方案也可以由光学拆分产生的 (R)-羧酸提供光学纯的标题化合物。