A Metal-Free General Procedure for Oxidation of Secondary Amines to Nitrones
作者:Carolina Gella、Èric Ferrer、Ramon Alibés、Félíx Busqué、Pedro de March、Marta Figueredo、Josep Font
DOI:10.1021/jo901108u
日期:2009.8.21
An efficient and metal-free protocol for direct oxidation of secondaryamines to nitrones has been developed, using Oxone in a biphasic basic medium as the sole oxidant. The method is general and tolerant with other functional groups or existing stereogenic centers, providing rapid access to enantiomerically pure compounds in good yields.
[3 + 2] Cycloaddition Reactions of Proline Benzyl Ester Nitrone with Alkenes and Alkynes
作者:Ronald C. Bernotas、Jeffrey S. Sabol、Lily Sing、Dirk Friedrich
DOI:10.1055/s-1999-2682
日期:1999.5
Proline-based nitrone 2a has been synthesized. It readily underwent [3 + 2] cycloadditions with a variety of alkene and alkyne substrates to give isoxazolidines and isoxazolines, respectively, with good to excellent regio- and diastereoselectivity.