Electrogenerated Acid-Catalyzed Reactions of Acetals, Aldehydes, and Ketones with Organosilicon Compounds, Leading to Aldol Reactions, Allylations, Cyanations, and Hydride Additions
electrogenerated acid (EG acid) in the silicon-mediated acid-catalyzed reactions; e.g., aldol reactions, allylations, cyanations, and hydride additions is described. The aldol reaction of acetals 1 with enol trimethylsilyl ethers 3 and 1,2-bis(trimethylsiloxy)alkenes 4 gives the corresponding adducts 5 and 6, respectively. The reaction proceeds smoothly with EG acid derived from perchlorate salts such
A Convenient Catalytic Procedure for the Addition of Trimethylsilyl Cyanide to Functionalised Ketones, Mediated by InBr3 − Insight into the Reaction Mechanism
作者:Marco Bandini、Pier Giorgio Cozzi、Andrea Garelli、Paolo Melchiorre、Achille Umani-Ronchi
This paper describes a useful and practical methodology for the addition of trimethylsilyl cyanide (TMSCN) to a large variety of functionalised and unfunctionalised ketones in the presence of catalytic amounts of anhydrous InBr3. The optimum procedure involves low catalyst loading (1 mol %) and appears general in scope and applicability for aromatic and aliphatic ketones. The desired cyanohydrins were
Catalytic cyanosilylation of ketones with simple phosphonium salt
作者:Xiu Wang、Shi-Kai Tian
DOI:10.1016/j.tetlet.2007.06.132
日期:2007.8
In the presence of 1-5 mot % of benzyltriphenylphosphonium chloride, a wide variety of unconjugated and conjugated, acyclic and cyclic ketones were transformed to their corresponding cyanohydrin silyl ethers in excellent yields. (c) 2007 Elsevier Ltd. All rights reserved.
Foley, Louise H., Synthetic Communications, 1984, vol. 14, # 14, p. 1291 - 1298
作者:Foley, Louise H.
DOI:——
日期:——
Indium tribromide: a highly effective catalyst for the addition of trimethylsilyl cyanide to α-hetero-substituted ketones
作者:Marco Bandini、Pier Giorgio Cozzi、Paolo Melchiorre、Achille Umani-Ronchi
DOI:10.1016/s0040-4039(01)00368-9
日期:2001.4
The catalytic addition of trimethylsilyl cyanide (TMSCN) to a large variety of hetero-substituted ketones promoted by anhydrous InBr3 has been studied. The low catalytic loading (0.1-1 mol%) and the mild experimental conditions required represent the key features of this novel catalytic system. (C) 2001 Elsevier Science Ltd. All rights reserved.