Palladium-Catalyzed Suzuki-Miyaura Coupling Reactions Involving β,β-Dihaloenamides: Application to the Synthesis of Disubstituted Ynamides
作者:Janine Cossy、Sylvain Couty、Marion Barbazanges、Christophe Meyer
DOI:10.1055/s-2005-864821
日期:——
β,β-Dihaloenamides can be successfully involved in palladium-catalyzed Suzuki-Miyaura coupling reactions. Whereas the resulting trisubstituted (Z)-β-bromoenamides could participate in a second cross-coupling leading to β,β-disubstituted enamides, the (Z)-β-chloroenamides have been converted to disubstituted ynamides by an E2 elimination.
β,β-二卤烯酰胺可以成功参与钯催化的铃木-宫浦耦合反应。生成的三取代(Z)-β-溴烯酰胺可以参与第二次交叉耦合,生成β,β-二取代烯酰胺,而(Z)-β-氯烯酰胺通过E2消除反应被转化为二取代的炔酰胺。