α-Chiral Acetylenes Having an All-Carbon Quaternary Center: Phase Transfer Catalyzed Enantioselective α Alkylation of α-Alkyl-α-alkynyl Esters
作者:Takuya Hashimoto、Kazuki Sakata、Keiji Maruoka
DOI:10.1002/anie.200901977
日期:2009.6.22
Going through the phases: The title reaction was found to proceed by an initial base‐mediated isomerization to allenyl esters and subsequent phase transfer catalyzed alkylation at the α position of the ester (see scheme).
分阶段进行:发现标题反应是通过初始的碱介导的异构化为烯丙基酯,然后在酯的α位进行相转移催化的烷基化反应而进行的(参见方案)。