A stereoselective intramolecular cyclopropanation via a de novo class of push–pull carbenes derived from DMDO-epoxidations of chiral ynamides
作者:Hongyan Li、Jennifer E. Antoline、Jin-Haek Yang、Ziyad F. Al-Rashid、Richard P. Hsung
DOI:10.1039/c0nj00063a
日期:——
This work describes the first examples of diastereoselective intramolecular cyclopropanations of a de novo class of pushâpull carbenes derived from DMDO-epoxidations of chiral ynamides. This reaction sequence essentially constitutes a tandem epoxidationâcyclopropanation that effectively gives rise to a series of structurally unique amido-cyclopropanes. A plausible mechanistic model is proposed revealing insights into this novel cyclopropanation process.
这项研究首次举例说明了从手性炔酰胺的 DMDO 环氧化反应中衍生出的一类新的推拉碳烯的非对映选择性分子内环丙烷化反应。这一反应序列基本上构成了串联环氧化-环丙烷化反应,有效地生成了一系列结构独特的氨基环丙烷。研究人员提出了一个合理的机理模型,揭示了这一新型环丙烷化过程的奥秘。