A Convenient Synthesis ofN‐Boc‐Protected α‐Aminonitriles from α‐Amidosulfones
摘要:
Synthesis of N-Boc-protected alpha-aminonitriles starting from N-Boc-protected alpha-aminosulfones is described. Treatment of the sulfone with two equivalents of potassium cyanide in 2-propanol or dichloromethane-H2O under phase transfer condition affords crystalline N-Boc-protected alpha-aminonitriles in good yield. Hydrolysis of the aminonitriles provides a convenient access to racemic a-amino acids.
Synthesis of N-Boc-protected alpha-aminonitriles starting from N-Boc-protected alpha-aminosulfones is described. Treatment of the sulfone with two equivalents of potassium cyanide in 2-propanol or dichloromethane-H2O under phase transfer condition affords crystalline N-Boc-protected alpha-aminonitriles in good yield. Hydrolysis of the aminonitriles provides a convenient access to racemic a-amino acids.
Asymmetric Strecker Reactions Catalyzed by Thiourea Phosphonium and Ammonium Salts
The application of asymmetric phase‐transfer catalysis to the Strecker reaction of ketimines was realized utilizing bifunctional thiourea‐phosphonium salts. The asymmetric Strecker reaction of aldimines was also realized utilizing quaternaryammoniumsaltsderivedfrom amino acids.