First Example of a Total Axial to Centered Chirality Transfer in the [2 + 2 + 2] Cycloadditions of Allenediynes
作者:Olivier Buisine、Corinne Aubert、Max Malacria
DOI:10.1055/s-2000-6300
日期:——
The cobalt-mediated [2 + 2 + 2] cycloaddition of allenediynes bearing a phosphine oxide group at one alkyne terminus is a completely regio-, chemo- and diastereoselective high yielding process. Moreover, a total transfer of chiral information from axial to centered chirality is evident, which makes this reaction a new and powerful tool for the preparation of enantiomerically enriched tricyclic derivatives.
在一个炔末端带有氧化膦基团的丙二炔的钴介导的[2+2+2]环加成是一种完全区域、化学和非对映选择性的高产率过程。此外,手性信息从轴向手性到中心手性的完全转移是明显的,这使得该反应成为制备对映体富集的三环衍生物的新的强大工具。