Synthesis of Enol Ethers and Enamines by Pd-Catalyzed Tosylhydrazide-Promoted Cross-Coupling Reactions
作者:José Barluenga、María Escribano、Patricia Moriel、Fernando Aznar、Carlos Valdés
DOI:10.1002/chem.200902718
日期:2009.12.14
α‐Alkoxycarbonyl and α‐aminocarbonyl compounds are good substrates for the recently developed tosylhydrazide‐promoted Pd‐catalyzed cross‐coupling of carbonyls with aryl halides. The reaction gives rise to enol ethers and enamines, respectively, which are useful synthetic intermediates in heterocyclic synthesis. Otherwise, they can be hydrolyzed to give α,α‐disubstituted aldehydes.
α-取代很好:α-烷氧羰基和α-氨基羰基化合物是最近开发的甲苯磺酰肼促进的Pd催化的羰基与芳基卤化物交叉偶联的良好底物。该反应分别产生烯醇醚和烯胺,它们是杂环合成中有用的合成中间体。否则,可以将它们水解得到α,α-二取代醛。