Geminal Difunctionalization of Vinylarenes: Concise Synthesis of 1,3-Dioxolan-4-ones
作者:Pandur Venkatesan Balaji、Srinivasan Chandrasekaran
DOI:10.1055/s-0039-1690250
日期:2019.12
We report a straightforward method for the synthesis of five-membered 1,3-dioxolan-4-ones by an unprecedented oxidative alkene geminal difunctionalization strategy using α-hydroxy carboxylic acids. Under the geminal oxidative addition conditions, various substituted α-hydroxy carboxylic acids and styrenes containing a variety of substituents, including β-substituted styrenes, were effectively coupled
我们报告了一种使用 α-羟基羧酸通过前所未有的氧化烯烃双官能化策略合成五元 1,3-dioxolan-4-ones 的简单方法。在孪生氧化加成条件下,各种取代的α-羟基羧酸和含有多种取代基的苯乙烯,包括β-取代的苯乙烯,与异丁基取代的手性α-羟基羧酸有效地区域选择性偶联(反马尔科夫尼科夫),提供具有优异非对映选择性的环化。氘标记和对照研究证实了半频哪醇重排中的芳基迁移导致 α-羟基羧酸的成对氧化加成。