Brønsted acid-catalyzed efficient Strecker reaction of ketones, amines and trimethylsilyl cyanide
作者:Guang-Wu Zhang、Dong-Hua Zheng、Jing Nie、Teng Wang、Jun-An Ma
DOI:10.1039/b924272d
日期:——
A general method for the one-pot, three-component Strecker reaction of ketones was developed using Brønsted acids as organocatalysts. A series of α-aminonitriles were obtained in good to excellent yields (79–99%). A preliminary extension to a catalytic enantioselective three-component Strecker reaction of ketones (up to 40% ee) is also described.
o-Benzenedisulfonimide and its chiral derivative as Brønsted acids catalysts for one-pot three-component Strecker reaction. Synthetic and mechanistic aspects
o-Benzenedisulfonimide (OBS) has efficiently catalysed the one-pot three-component reaction of ketones and aromatic amines with trimethylsilyl cyanide (TMSCN) giving the corresponding α-amino nitriles in excellent yields (23 examples; average yield 85%). Reaction conditions were very simple, green and efficient. Theoretical calculations have allowed us to explain the mechanism of this reaction which