Applications of C–H Functionalization Logic to Cyclobutane Synthesis
作者:Will R. Gutekunst、Phil S. Baran
DOI:10.1021/jo4027148
日期:2014.3.21
The application of C-H functionalization logic to target-oriented synthesis provides an exciting new venue for the development of new and useful strategies in organic chemistry. In this article, C-H functionalization reactions are explored as an alternative approach to access pseudodimeric cyclobutane natural products, such as the dictazole and the piperarborenine families. The use of these strategies in a variety of complex settings highlights the subtle geometric, steric, and electronic effects at play in the auxiliary guided C-H fimctionalization of cyclobutanes.
Total Synthesis and Structural Revision of the Piperarborenines via Sequential Cyclobutane C–H Arylation
作者:Will R. Gutekunst、Phil S. Baran
DOI:10.1021/ja209205x
日期:2011.11.30
functionalization logic is demonstrated in the totalsynthesis of piperarborenine B and piperarborenine D (reported structure). These syntheses feature a new preparation of cis-cyclobutane dicarboxylates from commercially available coumalate starting materials and a divergent approach to the controlled cis or trans installation of the two distinct aryl rings found in the natural products using the first
使用 CH 功能化逻辑构建不对称环丁烷的策略在哌芴醇 B 和哌芴醇 D(报告的结构)的全合成中得到证明。这些合成的特点是从市售的香豆酸酯原料中新制备顺式环丁烷二羧酸盐,以及使用环丁烷 CH 芳基化的第一个例子对天然产物中发现的两个不同芳环的受控顺式或反式安装的不同方法。Piperarborenine D 的结构被重新分配为头对头二聚体,该二聚体是使用分子内 [2+2] 光环加成策略合成的。