The Ti-BINOLate-catalyzed, enantioselective ring-opening of meso-aziridines with amines
作者:Saravanan Peruncheralathan、Sandra Aurich、Henrik Teller、Christoph Schneider
DOI:10.1039/c3ob40222c
日期:——
The titanium-BINOLate-catalyzed, highly enantioselective ring-opening reaction of meso-aziridines has been developed which furnishes trans-1,2-diamines in typically good yields and excellent enantioselectivities. N-Aryl aziridines attached to a 5- or 6-membered carbocyclic ring are among the best substrates for this process providing the products in up to >99% ee. The chiral catalyst is easily prepared in situ from commercially available components and does not require any laborious ligand synthesis. Structural investigations into the catalyst composition reveal an oligomeric structure of the active Ti-complex.
开发了由钛-BINOLate催化的高对映选择性meso-氮杂环的开环反应,该反应通常能以良好的产率和优异的对映选择性生成trans-1,2-二胺。N-芳基氮杂环与5-或6-成员碳环相连,是此过程的最佳底物之一,产物的对映体过量可达>99%。该手性催化剂可通过市售组分原位简便制备,无需繁琐的配体合成。对催化剂组成的结构研究显示,其活性钛复合物具有低聚合结构。