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