Highly Diastereoselective Aziridination of Imines with Trimethylsilyldiazomethane. Subsequent Silyl Substitution with Electrophiles, Ring Opening, and Metalation of <i>C</i>-SilylaziridinesA Cornucopia of Highly Selective Transformations
作者:Varinder K. Aggarwal、Emma Alonso、Marco Ferrara、Sharon E. Spey
DOI:10.1021/jo016312h
日期:2002.4.1
C-silylaziridines was investigated. Treatment with F(-) (tetrabutylammonium triphenyldifluorosilicate was used) in the presence of aldehydes gave the alpha-hydroxyaziridines in high yield and high diastereoselectivity (86:14-98:2) for the newly created stereogenic center. Complete retention of configuration was observed in the substitution of the silyl group with electrophiles in all cases. Trapping with deuterium
Highly Selective Aziridination of Imines Using Trimethylsilyldiazomethane and Applications of <i>C</i>-Silylaziridines in Synthesis
作者:Varinder K. Aggarwal、Marco Ferrara
DOI:10.1021/ol006772h
日期:2000.12.1
[GRAPHICS]Trimethylsilyldiazomethane has been found to add directly to N-sulfonyl (Ts and SES) imines to afford aziridines in good yields and high cis stereoselectivities. The silyl group can be substituted by treatment with a fluoride source and electrophiles again with high selectivity. Complete regioselectivity is observed in ring opening of these aziridines with nucleophiles.
Aerobic Oxidative Amination of Unactivated Alkenes Catalyzed by Palladium
作者:Jodie L. Brice、Jenna E. Harang、Vitaliy I. Timokhin、Natia R. Anastasi、Shannon S. Stahl
DOI:10.1021/ja0433020
日期:2005.3.9
been identified. To be successful, these reactions must be conducted under cocatalyst-free conditions that involve direct dioxygen-coupled turnover of the palladium catalyst. The oxidative amination products of norbornene and other cyclic alkenes implicate a cis-aminopalladation mechanism.