Two Distinct Ag(I)- and Au(I)-Catalyzed Olefinations between α-Diazo Esters and <i>N</i>-Boc-Derived Imines
作者:Rahul Dadabhau Kardile、Rai-Shung Liu
DOI:10.1021/acs.orglett.9b02343
日期:2019.8.16
Metal-catalyzed reactions between α-diazo esters and imines were well-known to yield aziridine derivatives exclusively. This work reports two new olefination reactions between N-Boc-derived (Boc = tert-Butyloxycarbonyl) imines and α-diazo esters with Ag(I) and Au(I) catalysts, respectively. Our mechanistic studies reveal that these new olefinations involve an initial attack of diazo esters on metal/imine
众所周知,α-重氮酯和亚胺之间的金属催化反应只能生成氮丙啶衍生物。这项工作报告了分别由Ag(I)和Au(I)催化剂在N -Boc衍生的(Boc =叔-丁氧基羰基)亚胺和α-重氮酯之间进行的两个新的烯烃化反应。我们的机理研究表明,这些新的烯化反应涉及重氮酯对金属/亚胺络合物的最初攻击,以形成曼尼希加成中间体,随后通过Roskamp反应提供α-芳基-β-氨基丙烯酸酯,或形成β-芳基-β -氨基丙烯酸酯通过形成卡宾银而形成。