Phase-transfer catalyzed formation of .alpha.-cyano ketones from ketone aroylhydrazones in NaCN(aq)-inert organic solvent system
摘要:
Alpha-Cyanoalkyl aryl ketones can be obtained from ketone aroylhydrazones by heterogeneous reaction with aqueous sodium cyanide, an inert organic solvent, and acetic acid in the presence of air and a catalytic amount of a quaternary ammonium salt. The initially formed HCN adducts undergo air oxidation followed by alkaline-induced decomposition affording the alpha-cyanoalkyl ketones. The phase-transfer catalyst promotes all three reactions.
Electrochemical oxidation of ketone acylhydrazones and their hydrogen cyanide adducts in sodium cyanide-methanol. Transformation of ketones to nitriles
Efficient [(NHC)Au(NTf<sub>2</sub>)]-catalyzed hydrohydrazidation of terminal and internal alkynes
作者:Maximillian Heidrich、Herbert Plenio
DOI:10.3762/bjoc.16.175
日期:——
The efficient hydrohydrazidation of terminal (6a–r, 18 examples, 0.1–0.2 mol % [(NHC)Au(NTf2)], T = 60 °C) and internal alkynes (7a–j, 10 examples, 0.2–0.5 mol % [(NHC)Au(NTf2)], T = 60–80 °C) utilizing a complex with a sterically demanding bispentiptycenyl-substituted NHC ligand and the benign reaction solvent anisole, is reported.