A novel synthetic path to enantiomerically enriched 5-hydroxycyclohex-2-enone, a versatile chiral building block, is developed by a two-step sequence, where an enantioselective deprotonation of a 3,5-dihydroxycyclohexanone derivative with lithium (S,S′)-α,α′-dimethyldibenzylamide in the presence of TMSCl, and subsequent treatment of the silyl enol ether with TBAF in THF at room temperature are employed as the key reactions.
通过一个两步序列,开发出了一种新的合成途径来获得对映体富集的 5-羟基环己-2-烯酮--一种多功能手性结构单元、在 TMSCl 存在下,用 (S,S′)-α,α′-二甲基二苄酰胺
锂对 3, 5-二羟基
环己酮衍
生物进行对映选择性去质子化,然后在室温下用 TBAF 在 THF 中处理
硅基烯醚,这是关键反应。