for asymmetric [3+2] cycloaddition reactions. A silver complex prepared from silver bis(trimethylsilyl)amide (AgHMDS) and (R)‐DTBM‐SEGPHOS worked well in asymmetric [3+2] cycloaddition reactions of α‐aminoester Schiff bases with several olefins to afford the corresponding pyrrolidine derivatives in high yields with remarkable exo‐ and enantioselectivities. Furthermore, α‐aminophosphonate Schiff bases
Silver lining: Highly exo‐selective asymmetric [3+2] cycloaddition of α‐amino ester Schiff bases with activated olefins proceeds in the presence of AgHMDS/1. The α‐amino ester Schiff bases including those derived from aliphatic imines successfully reacted to afford the corresponding pyrrolidine derivatives in high yield with high exo‐ and enantioselectivities. EWG=electron‐withdrawing group, HMDS=
Probing of the cis-5-phenyl proline scaffold as a platform for the synthesis of mechanism-based inhibitors of the Staphylococcus aureus sortase SrtA isoform
作者:Konstantin V. Kudryavtsev、Matthew L. Bentley、Dewey G. McCafferty
DOI:10.1016/j.bmc.2009.02.008
日期:2009.4
cis-5-Phenyl prolinates with electrophilic substituents at the fourth position of a pyrrolidine ring were synthesized by 1,3-dipolar cycloaddition of arylimino esters with divinyl sulfone and acrylonitrile. 4-Vinylsulfonyl 5-phenyl prolinates inhibit Staphylococcus aureus sortase SrtA irreversibly by modification of the enzyme Cys184 and could be used as hits for the development of antibacterials and antivirulence agents. (C) 2009 Elsevier Ltd. All rights reserved.
Lithium bromide-triethylamine induced cycloaddition of N-alkylidene 2-amino esters and amides to electron-deficient olefins with high regio- and stereoselectivity
作者:Otohiko Tsuge、Shuji Kanemasa、Manabu Yoshioka
DOI:10.1021/jo00242a008
日期:1988.4
Switching the Stereoselectivity: (Fullero)Pyrrolidines “a la Carte”
作者:Enrique E. Maroto、Salvatore Filippone、Angel Martín-Domenech、Margarita Suarez、Nazario Martín
DOI:10.1021/ja306105b
日期:2012.8.8
Stereodivergent syntheses of cis/trans pyrrolidino[3,4:1,2]fullerenes and endo/exo pyrrolidines are reported with high enantioselectivity levels. Fullerenes are revealed as a useful benchmark to develop suitable catalysts to control the stereochemical outcome and to shed light on the mechanism involved in the related 1,3-dipolar cycloaddition.