Des quantites catalytiques de [Cp 2 Fe]BF 4 ou Ce (IV) en solution a -78°C sous CO,转化 CpFeCO[P(OPh) 3 ](η 1 -C(R 3 )=C (R 1 ) R 2 ) en CpFeCO[P(OPh) 3 ](η 1 -C(O)C(R 3 )=CR 1 R 2 ) avec unrendement eleve。Lastereochimie des produits depends des groupes R. On peut aussi convertir les complexes alcenylacyl enesters alcenyl, d'ou les alcenes
Copper-Catalyzed Electrophilic Carbofunctionalization of Alkynes to Highly Functionalized Tetrasubstituted Alkenes
作者:Marcos G. Suero、Elliott D. Bayle、Beatrice S. L. Collins、Matthew J. Gaunt
DOI:10.1021/ja401840j
日期:2013.4.10
Copper catalysts enable the electrophiliccarbofunctionalization of alkynes with vinyl- and diaryliodonium triflates. The new process forms highly substituted alkenyl triflates from a range of alkynes via a pathway that is opposite to classical carbometalation. The alkenyl triflate products can be elaborated through cross-coupling reactions to generate synthetically useful tetrasubstituted alkenes