Stereoelectronic control in the solvolysis of spiroepoxidic 1-norbornyl triflates: unexpected reactivity in 3-bromomethyl derivatives
作者:Antonio García Martínez、Enrique Teso Vilar、Amelia García Fraile、Santiago de la Moya Cerero、Cristina Díaz Morillo
DOI:10.1016/j.tetlet.2011.02.006
日期:2011.4
are enantiospecifically obtained in high yield from epimeric camphor-derived 3-endo-bromomethyl-substituted spiroepoxidic 1-norbornyl triflates. The process takes place via a domino reaction stereoelectronically controlled by the bromine atom. The described process has synthetic value, since it opens the way for a future enantiospecific preparation of 2,3-disubstituted tetrahydrofurans from camphor
有趣的降冰片烷稠合的四氢呋喃,在降冰片烷骨架中具有额外的合成上有价值的邻二氧基取代,是从对映体樟脑衍生的3-内-溴甲基取代的螺环环氧-1-降冰片基三氟甲磺酸酯高对映体获得的。该过程通过由溴原子立体电子控制的多米诺反应进行。所描述的方法具有合成价值,因为它为将来从樟脑制备对映体特异性的2,3-二取代的四氢呋喃开辟了道路。