Highly Brominated Norbornanes by Photobromination as Precursors for the Convenient Synthesis of 2,3,5,6-Tetrabromo- and 2,3,5,6-Tetramethoxy-substituted Norbornadienes
作者:Waldemar Adam、Osman Cakmak、Chantu R. Saha-Möller、Ahmet Tutar
DOI:10.1055/s-2002-19330
日期:——
An efficient synthesis is described for hexabromonor-bornane by photobromination of norbornadiene. Double dehydrobromination of the hexabromide by t-BuOK affords in high yield 2,3,5,6-tetrabromonorbornadiene, its copper-assisted treatment with sodium methoxide leads to the 2,3,5,6-tetramethoxy derivative. The tetrabromide constitutes a valuable precursor for the preparation of functionalized tetrasubstituted
描述了一种通过降冰片二烯的光溴化作用合成六溴单降冰片烷的有效方法。通过 t-BuOK 对六溴化物进行双脱溴化氢以高产率提供 2,3,5,6-四溴单降冰片二烯,其铜辅助甲醇钠处理产生 2,3,5,6-四甲氧基衍生物。四溴化物构成制备官能化四取代降冰片二烯的有价值的前体。