The scope and limitations of a tandem 5-exo dig cyclization/Claisen rearrangement sequence involving appropriately substituted 4-alkyn-1-ols as an efficient "one-pot" route to fused tricyclic ring systems is described. The reaction rates were found to be strongly dependent on the nature of the terminal substitutent of the triple bond. In some cases the entire sequence was found to proceed in good yield
描述了串联5-exo dig环化/ Claisen重排序列的范围和局限性,其中涉及适当取代的4-炔-1-醇作为通往稠合
三环系统的有效“一锅”路线。发现反应速率强烈依赖于三键的末端取代基的性质。在某些情况下,发现整个序列在低至115摄氏度的温度下都能以良好的产率进行。