Unsaturated five-membered selenium–germanium containing heterocycles based on the reactions of selenium di- and tetrahalides with diorganyl diethynyl germanes
作者:Svetlana V. Amosova、Maxim V. Penzik、Alexander V. Martynov、Nataliya A. Makhaeva、Nina O. Yarosh、Mikhail G. Voronkov
DOI:10.1016/j.jorganchem.2008.07.008
日期:2008.10
the heterocycles were proved by multinuclear (1H, 13C, 77Se) spectroscopy and mass-spectrometry. In the 1H NMR spectra of Z-isomers of 1,4-selenagermafulvenes a long-range spin–spin interaction between exo- and endocyclic olefinic protons through five bonds is revealed lacking in the E-isomers.
二卤化硒与二有机基二乙炔基锗烷在CHCl 3中的区域和立体选择性反应,从制备级到定量级,提供了一种新型的含硒锗杂环化合物-3,6-dihalogen-4,4-diorganyl-1, 4-selenagermafulvenes。在相同条件下四氯化硒的反应导致了新一类含硒锗的环戊烯杂环的首个代表-2-dichloromethyl-2,4-dichloro-3,3-diorganyl-1-selena-3-germacyclopentenes- 4以及由于环戊烯杂环的自发脱氯化氢而形成的未知的3,6,6-三氯-4,4-二烷基-1,4-硒代富马烯酮。在SeBr 4的情况下脱氢溴化的过程占主导地位。杂环的结构通过多核(1 H,13 C,77 Se)光谱和质谱证实。在1,4-硒代烯丙基富马烯的Z-异构体的1 H NMR光谱中,揭示了外消旋和内环烯属质子之间通过五个键的远距离自旋-自旋相互作用,表明E-异构体缺乏。