highly efficient electrophilic cyanation of boron enolates using readily available cyanating reagents, N‐cyano‐N‐phenyl‐p‐toluenesulfonamide (NCTS) and p‐toluenesulfonyl cyanide (TsCN), is reported. Various β‐ketonitriles were prepared by this new protocol, which has a remarkably broad substrate scope compared to existing methods. The present method also allowed efficient synthesis of β‐ketonitriles containing
Expedient Acylations of Primary and Secondary Alkyl Cyanides to α-Substituted β-Ketonitriles
作者:Alan R. Katritzky、Ashraf A. A. Abdel-Fattah、Mingyi Wang
DOI:10.1021/jo026796x
日期:2003.6.1
Primary and secondary cyanides are efficiently acylated with N-acylbenzotriazoles 3a-f (derived from a variety of acids) to afford the corresponding alpha-substituted beta-ketonitriles 5a-r in 67-96% yields.
Direct amino acid-catalyzed cascade reductive alkylation of arylacetonitriles: high-yielding synthesis of ibuprofen analogs
作者:Dhevalapally B. Ramachary、M. Shiva Prasad
DOI:10.1016/j.tetlet.2010.07.131
日期:2010.10
A novel approach for a one-pot, three-component reductivealkylation (TCRA) reaction of arylacetonitriles-containing electron-withdrawing groups with aldehydes/ketones and 1,4-dihydropyridine via iminium-catalysis has been developed. Many TCRA reaction products have direct applications in agricultural and pharmaceutical chemistry.