Practical and Highly Selective Sulfur Ylide-Mediated Asymmetric Epoxidations and Aziridinations Using a Cheap and Readily Available Chiral Sulfide: Extensive Studies To Map Out Scope, Limitations, and Rationalization of Diastereo- and Enantioselectivities
作者:Ona Illa、Mariam Namutebi、Chandreyee Saha、Mehrnoosh Ostovar、C. Chun Chen、Mairi F. Haddow、Sophie Nocquet-Thibault、Matteo Lusi、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1021/ja405073w
日期:2013.8.14
The chiral sulfide, isothiocineole, has been synthesized in one step from elemental sulfur, γ-terpinene, and limonene in 61% yield. A mechanism involving radical intermediates for this reaction is proposed based on experimental evidence. The application of isothiocineole to the asymmetric epoxidation of aldehydes and the aziridination of imines is described. Excellent enantioselectivities and diastereoselectivities