Diastereoselective Synthesis of 2,3,5-Trisubstituted Tetrahydrofurans via Cyclofunctionalization Reactions. Evidence of Stereoelectronic Effects
作者:Yvan Guindon、François Soucy、Christiane Yoakim、William W. Ogilvie、Louis Plamondon
DOI:10.1021/jo010873r
日期:2001.12.1
The work described herein considers the impact of stereoelectronic effects and allylic 1,3-strain in controlling the cyclofunctionalization reaction when a hydroxyl group is at the allylic position. The stereoelectronic arguments are supported by independent iodocyclization reactions performed using two secondary alcohols. The transition-state pathways involved in these reactions are established through
本文所述的工作考虑了当羟基位于烯丙基位置时,立体电子效应和烯丙基1,3-菌株在控制环官能化反应中的影响。立体电子学观点得到使用两种仲醇进行的独立碘环化反应的支持。这些反应涉及的过渡态途径是通过相对反应速率的比较建立的。双向方法用于演示碘化反应可区分具有伪C(2)对称轴的分子中的末端的潜力,表明双向合成可用于区分替代的过渡态途径。