Remarkable Alkene-to-Alkene and Alkene-to-Alkyne Transfer Reactions of Selenium Dibromide and PhSeBr. Stereoselective Addition of Selenium Dihalides to Cycloalkenes
作者:Vladimir A. Potapov、Maxim V. Musalov、Evgeny O. Kurkutov、Vladimir A. Yakimov、Alfiya G. Khabibulina、Maria V. Musalova、Svetlana V. Amosova、Tatyana N. Borodina、Alexander I. Albanov
DOI:10.3390/molecules25010194
日期:——
The original goal of this research was to study stereochemistry of selenium dihalides addition to cycloalkenes and properties of obtained products. Remarkable alkene-to-alkene and alkene-to-alkyne transfer reactions of selenium dibromide and PhSeBr were discovered during this research. The adducts of selenium dibromide with alkenes or cycloalkenes easily exchange SeBr2 with other unsaturated compounds
本研究的最初目标是研究二卤化硒加成到环烯烃的立体化学和所得产物的性质。在这项研究中发现了显着的二溴化硒和 PhSeBr 的烯烃到烯烃和烯烃到炔烃的转移反应。二溴化硒与烯烃或环烯烃的加合物在室温下在乙腈中很容易与其他不饱和化合物(包括乙炔)交换 SeBr2。PhSeBr 加合物与烯烃或环烯烃发生类似的烯烃到烯烃和烯烃到炔烃的转移反应。假设的反应途径包括硒基团从硒物种转移到烯烃或炔烃。发现有效的SeBr2和PhSeBr转移试剂是Se(CH2CH2Br)2和PhSeCH2CH2Br,它们释放乙烯,导致平衡的移动。双(E-2-溴乙烯基)硒化物和不对称E-2-溴乙烯基硒化物的区域选择性和立体选择性合成是基于SeBr2和PhSeBr转移反应开发的,与SeBr2和PhSeBr与炔烃的类似加成反应相比,该反应具有更高的选择性相同的条件。