作者:Götz Bucher
DOI:10.1002/ejoc.200200584
日期:2003.6
The reduction of di-tert-butyl ketone (1) with alkali metals has been revisited. A novel product, 2,5,5-tri-tert-butyl-3-methyl-4,5-dihydrofuran (4), was isolated from the product mixture in very low yield. The formation of 4 requires the elimination of a methyl radical from the radical anion of 1 as key step. An alternative reaction mechanism, which involves the formation of the dianion of 1, was
重新审视了用碱金属还原二叔丁基酮 (1)。从产物混合物中以非常低的产率分离出新产物 2,5,5-三-叔丁基-3-甲基-4,5-二氢呋喃 (4)。4 的形成需要从 1 的自由基阴离子中消除甲基自由基作为关键步骤。根据 DFT 计算结果,排除了另一种反应机制,即 1 的二价阴离子的形成。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)