Iron-Catalyzed Efficient Synthesis of Amides from Aldehydes and Amine Hydrochloride Salts
作者:Subhash Chandra Ghosh、Joyce S. Y. Ngiam、Christina L. L. Chai、Abdul M. Seayad、Tuan Thanh Dang、Anqi Chen
DOI:10.1002/adsc.201200020
日期:2012.5.21
A practical and efficient method for the synthesis of amides has been developed by iron‐catalysed oxidative amidation of aldehydes with aminehydrochloridesalts. A wide range of amides have been obtained in good to excellent yields under mild conditions. The application of this novel amide formation reaction to the synthesis of pharmaceutical compounds has been successfully demonstrated.
Copper-Catalyzed Oxidative Amidation of Aldehydes with Amine Salts: Synthesis of Primary, Secondary, and Tertiary Amides
作者:Subhash Chandra Ghosh、Joyce S. Y. Ngiam、Abdul M. Seayad、Dang Thanh Tuan、Christina L. L. Chai、Anqi Chen
DOI:10.1021/jo301252c
日期:2012.9.21
aldehydes with economic ammonium chloride or amine hydrochloride salts has been developed for the synthesis of a wide variety of amides by using inexpensive copper sulfate or copper(I) oxide as a catalyst and aqueous tert-butyl hydroperoxide as an oxidant. This amidation reaction is operationally straightforward and provides primary, secondary, and tertiary amides in good to excellent yields for most
A one-step route to azomethine ylides via chloroiminium salts
作者:Rosaleen J. Anderson、Andrei S. Batsanov、Natalia Belskaia、Paul W. Groundwater、Otto Meth-Cohn、Andrey Zaytsev
DOI:10.1016/j.tetlet.2003.11.095
日期:2004.1
A new, one-step procedure for the generation of azomethineylides, 4 and 20, via chloroiminium salts, 3 and 19, is reported. The generation of the azomethineylides was confirmed by their trapping with dimethyl acetylenedicarboxylate (DMAD) which, upon spontaneous 1,4-dehydrochlorination, gave the corresponding pyrroles 17 and 21.
Novel pyrrole derivatives are disclosed as Aβ
42
-lowering agents for the treatment and prevention of neurodegenerative disorders characterized by the formation or accumulation of amyloid plaques comprising the Aβ
42
peptide.
Novel pyrrole derivatives are disclosed as Aβ
42
-lowering agents for the treatment and prevention of neurodegenerative disorders characterized by the formation or accumulation of amyloid plaques comprising the Aβ
42
peptide.