Synthesis of functionalized arylpyridines and -pyrimidines by domino [4+2]/retro [4+2] cycloadditions of electron-rich dienes with alkynylpyridines and -pyrimidines
作者:Obaid-ur-Rahman Abid、Muhammad Nawaz、Muhammad Farooq Ibad、Rasheed Ahmad Khera、Viktor Iaroshenko、Peter Langer
DOI:10.1039/c0ob00755b
日期:——
Aryl-substituted pyridines and pyrimidines were prepared by [4+2] cycloadditions of alkynyl-substituted pyridines and -pyrimidines with electron-rich dienes. The reactions proceed by formation of a bridged cycloadduct and subsequent thermal extrusion of ethylene. The pyridine moiety plays a crucial role for the success of the reaction.