Synthesis and Characterization of Aliphatic α-Dithiones, Di(1-adamantyl)- and Di-<i>tert</i>-butylethanedithiones
作者:Yutaka Ono、Yoshiaki Sugihara、Akihiko Ishii、Juzo Nakayama
DOI:10.1021/ja0371496
日期:2003.10.1
2,3-Di(1-adamantyl)thiirene 1-oxide quickly reacted with Lawesson's reagent in CH2Cl2 at room temperature to provide di(1-adamantyl)ethanedithione (1) as thermally labile, violet crystals in 20% isolated yield. The use of CS2 as the solvent gave 1 in 46% isolated yield. The reaction in the presence of dimethyl acetylenedicarboxylate furnished dimethyl 4,5-di(1-adamantyl)-2,3-thiophenedicarboxylate
2,3-二(1-金刚烷基)硫茚1-氧化物在室温下与劳森试剂在 CH2Cl2 中快速反应,以 20% 的分离产率提供二(1-金刚烷基)乙二硫酮 (1) 作为热不稳定的紫色晶体。使用 CS2 作为溶剂得到 1,分离产率为 46%。在乙炔二甲酸二甲酯存在下的反应以51%的产率提供4,5-二(1-金刚烷基)-2,3-噻吩二甲酸二甲酯。在实验观察的基础上提出了形成 1 的初步机制。基于光谱数据(NMR、质量、IR、拉曼和UV/vis)和DFT计算表征了1的结构。1 重排为 3,4-di(1-adamantyl)-1,2-dithiete,动力学参数为 DeltaH = 17.6 +/- 0.2 kcal mol-1,DeltaS = -23.0 +/- 0.7 cal K-1 mol- 1,DeltaG = 24.4 +/- 0.4 kcal mol-1。