Please use this identifier to cite or link to this item:
Title: Protecting group directed asymmetric organocatalysis [3+2] cycloaddition of isocyanide and methyleneindolinone : stereoselective construction of spirocyclic oxindoles
Authors: Zhang, Xuan
Keywords: DRNTU::Science::Chemistry::Organic chemistry::Organic synthesis
Issue Date: 2010
Abstract: The spiro[pyrrodilin-3,3’-oxindole] ring skeleton is a privileged structure with promising biological and pharmaceutical properties and only limited asymmetric synthetic approaches were reported due to the challenge in the synthesis of highly stereocontrolled quaternary carbon chiral centers. We developed a novel asymmetric synthesis of spirocyclic oxindoles via [3+2] cycloaddition of isocyanide and methyleneindolinone to afford adducts with two quaternary and one tertiary carbon stereocenters in moderate to good yield and excellent enantioselectivities. We also demonstrated that changing the protecting group of nitrogen atom in methyleneindolenone can result in change of the absolute configuration of desired spiro[pyrrodilin-3,3’-oxindole] core.
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
  Restricted Access
2.55 MBAdobe PDFView/Open

Page view(s) 50

checked on Oct 26, 2020

Download(s) 50

checked on Oct 26, 2020

Google ScholarTM


Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.