Reactions of 2-(Dialkylamino)arylacetonitriles with Acetylenes Under Basic Conditions. A Simple Synthesis of Substituted Mono and Diketones
作者:T. Zdrojewski、A. Jończyk
DOI:10.1055/s-1990-26839
日期:——
2-(Dialkylamino)arylacetonitriles 1 react with acetylenes 2a,b in dimethyl sulfoxide, powdered sodium hydroxide and triethylbenzylammonium chloride as a catalyst to give 3 and/or 4. The latter are formed via addition of anion 8 to immonium salt 9. The type of product formed depends on the basicity of amino moiety in 3. Furthermore, compound 1 adds to C-1 of acetylene 2c affording the vinyl derivatives 15. The products 3, 4, 11 and 15 are hydrolyzed to give ketones 5-7, 12 and 16, respectively.
Strecker reactions with hexacyanoferrates as non-toxic cyanide sources
作者:Caroline Grundke、Till Opatz
DOI:10.1039/c9gc00720b
日期:——
The Strecker reaction is the most widely applied three-component reaction. Although highly useful for the preparation of α-amino nitriles, α-amino acids, hydantoins and numerous related compounds, the need for the application of toxic sources of HCN limits its application in both academic and industrial settings. Here, we present a facile protocol for Strecker reactions using a mixture of potassium
Treatment of α-amino-α-arylacetonitriles with aldehyde arenesulfonyl hydrazones affords unsymmetrical α-aminoazines in high yields, which formed by replacement of the arenesulfonyl group of the hydrazone by the acetonitrile carbanion. The formation-mechanism of azines is also discussed.
An Umpolung Route to Amides from α‐Aminonitriles under Metal‐Free Conditions
作者:Sathyendran Swetha、Gopal Chandru Senadi
DOI:10.1002/adsc.202200607
日期:2022.8.16
synthesize secondary and tertiary amides using O2 or air as an amide oxygen source. Radical scavenging studies disclosed that the cleavage of C−CN bond may proceed via an anionic pathway. The practicality of the work was also demonstrated through an in situ generated α-aminonitriles from corresponding aldehydes and amines to afford amides. The important features of this work include broad functional group