OH-Directed Alkynylation of 2-Vinylphenols with Ethynyl Benziodoxolones: A Fast Access to Terminal 1,3-Enynes
作者:Peter Finkbeiner、Ulrich Kloeckner、Boris J. Nachtsheim
DOI:10.1002/anie.201412148
日期:2015.4.13
The first direct alkynylation of 2‐vinylphenols was developed. The rationally optimized hypervalent iodine reagent TIPS‐EBX* in combination with [(Cp*RhCl2)2] as a CH‐activating transition metal catalyst enables the construction of a variety of highly substituted 1,3‐enynes in high yields of up to 98 %. This novel CH activation method shows excellent chemoselectivity and exclusive (Z)‐stereoselectivity
首次开发了2-乙烯基苯酚的直接炔基化反应。的合理优化高价碘试剂TIPS-EBX *与[(CP *的RhCl组合2)2 ]为C H-活化的过渡金属催化剂使各种高度取代的1,3-烯炔的在高收率的施工高达98%。此新型C- ħ活化方法表现出优异的化学选择性和独占(Ž)-stereoselectivity,并且它是显着也是温和并耐受多种官能团。此外,还证明了合成的1,3-烯炔的修饰。据我们所知,这是用高价碘试剂进行OH指导的CH烷基化的第一个例子。