Ruthenium-Catalyzed Addition of Primary Amides to Alkynes: A Stereoselective Synthesis of Secondary Enamides
作者:Lukas Gooßen、Mathieu Blanchot、Kifah Salih、Käthe Gooßen
DOI:10.1055/s-0029-1216847
日期:2009.7
anti-Markovnikov addition of primary amides to terminal alkynes under the formation of Z-configured secondary enamides is efficiently promoted by a catalyst system generated in situ from bis(2-methallyl)(cycloocta-1,5-diene)ruthenium(II), 1,4-bis(dicyclohexylphosphino)butane, and ytterbium triflate. The thermodynamically more stable E-isomers are accessible by combining the above hydroamidation with an in
由双(2-甲基烯丙基)(环辛-1,5-二烯)钌(II)原位生成的催化剂体系可有效地促进在Z-构型仲酰胺的形成下向末端炔烃中伯酰胺的反马尔科夫尼科夫加成反应。,1,4-双(二环己基膦基)丁烷和三氟甲磺酸。通过使用三乙胺和分子筛将上述加氢酰胺化与原位双键异构化反应相结合,可获得热力学更稳定的E-异构体。 炔烃-酰胺-酰胺-加氢酰胺化-钌