Thermolyse et photolyse d'heterocycles a liaison GeS. Mise en evidence de la formation de germylenes et germathiones
作者:J. Barrau、M. El Amine、G. Rima、J. Satgé
DOI:10.1016/0022-328x(84)80718-4
日期:1984.12
3-digerma-1,4-dithiane (I) decomposes slowly at room temperature by α-elimination to yield dimethylgermylene (Me2Ge:) and 2,2-dimethyl-2-germa-1,3-dithiolane (II). 2,2,3,3,4,4-Hexamethyl-2,3,4-trigerma-1,5-dithiepane (III) is obtained by the insertion of Me2Ge: into the sulfur-germanium bond of I. At 200°C, I undergoes thermal fragmentation leading to II, III and 2,2,3,3,5,5-hexamethyl-2,3,5-trigerma-1,4-dithiolane
研究了2,3-digerma-1,4-dithianes,2,3,5-trigerma-1,4-dithiolanes和tetragerma-1,4-dithianes的光解和热解。2,2,3,3-四甲基-2,3-二甲基-1,4-二噻吩(I)在室温下通过α消除反应缓慢分解,生成二甲基亚锗烯(Me 2 Ge :)和2,2-二甲基-2 -germa-1,3-dithiolane(II)。通过将Me 2 Ge:插入I的硫-锗键中,可得到2,2,3,3,4,4-六甲基-2,3,4-trigerma-1,5-二硫潘(III)。在200°C下,I经历热裂解反应,生成II,III和2,2,3,3,5,5-六甲基-2,3,5-trigerma-1,4-dithiolane。这些结果是由两种同时发生的I分解机理解释的,涉及形成二甲基锗烯(Me 2 Ge :)和二甲基锗硫酮(Me 2GeS)。I或2,2,3