Masked Oxo Sulfinimines (N-Sulfinyl Imines) in the Asymmetric Synthesis of Proline and Pipecolic Acid Derivatives
摘要:
[GRAPHICS]On addition of Et2AlCN/i-PrOH, masked oxo sulfinimines give alpha -amino nitriles that afford oxo alpha -amino acids on hydrolysis. These amino acids cyclize and are reduced to cis proline and cis pipecolic acids derivatives in high ee and good yield. This new procedure avoids many of the limitations related to the preparation of oxo amino acids from proteinogenic amino acids.
Masked Oxo Sulfinimines (N-Sulfinyl Imines) in the Asymmetric Synthesis of Proline and Pipecolic Acid Derivatives
摘要:
[GRAPHICS]On addition of Et2AlCN/i-PrOH, masked oxo sulfinimines give alpha -amino nitriles that afford oxo alpha -amino acids on hydrolysis. These amino acids cyclize and are reduced to cis proline and cis pipecolic acids derivatives in high ee and good yield. This new procedure avoids many of the limitations related to the preparation of oxo amino acids from proteinogenic amino acids.
Masked Oxo Sulfinimines (<i>N</i>-Sulfinyl Imines) in the Asymmetric Synthesis of Proline and Pipecolic Acid Derivatives
作者:Franklin A. Davis、Huiming Zhang、Seung H. Lee
DOI:10.1021/ol015520t
日期:2001.3.1
[GRAPHICS]On addition of Et2AlCN/i-PrOH, masked oxo sulfinimines give alpha -amino nitriles that afford oxo alpha -amino acids on hydrolysis. These amino acids cyclize and are reduced to cis proline and cis pipecolic acids derivatives in high ee and good yield. This new procedure avoids many of the limitations related to the preparation of oxo amino acids from proteinogenic amino acids.