Investigation of the Configurational Stabilities of Chiral Isocyanoacetates in Multicomponent Reactions
摘要:
Isocyanoacetates are uniquely reactive compounds characterized by an ambivalent isocyano functional group and an enolizable alpha-carbon. It is widely believed that chiral alpha-substituted isocyanoacetates are configurationally unstable in some synthetically useful isocyanide-based multicomponent reactions. Herein, we demonstrate that chiral isocyanoacetates can be used with minimal to negligible epimerization in a variety of canonical Ugi four-component condensations as well as Joullie-Ugi three-component condensations, reactions that are particularly useful for constructing complex peptide structures in a single synthetic operation.
Investigation of the Configurational Stabilities of Chiral Isocyanoacetates in Multicomponent Reactions
摘要:
Isocyanoacetates are uniquely reactive compounds characterized by an ambivalent isocyano functional group and an enolizable alpha-carbon. It is widely believed that chiral alpha-substituted isocyanoacetates are configurationally unstable in some synthetically useful isocyanide-based multicomponent reactions. Herein, we demonstrate that chiral isocyanoacetates can be used with minimal to negligible epimerization in a variety of canonical Ugi four-component condensations as well as Joullie-Ugi three-component condensations, reactions that are particularly useful for constructing complex peptide structures in a single synthetic operation.
Investigation of the Configurational Stabilities of Chiral Isocyanoacetates in Multicomponent Reactions
作者:Daniel W. Carney、Jonathan V. Truong、Jason K. Sello
DOI:10.1021/jo201817k
日期:2011.12.16
Isocyanoacetates are uniquely reactive compounds characterized by an ambivalent isocyano functional group and an enolizable alpha-carbon. It is widely believed that chiral alpha-substituted isocyanoacetates are configurationally unstable in some synthetically useful isocyanide-based multicomponent reactions. Herein, we demonstrate that chiral isocyanoacetates can be used with minimal to negligible epimerization in a variety of canonical Ugi four-component condensations as well as Joullie-Ugi three-component condensations, reactions that are particularly useful for constructing complex peptide structures in a single synthetic operation.