Silica Sulfuric Acid Catalyzed One-Pot Synthesis of α-Aminonitriles
作者:Wei-Yi Chen、Jun Lu
DOI:10.1055/s-2005-872654
日期:——
A simple and efficient method has been developed for the synthesis of α-aminonitriles by a one-pot three-component condensation of aldehydes, amines, and trimethylsilyl cyanide in the presence of a catalytic amount of silicasulfuricacid at room temperature. The silicasulfuricacid is reusable and could be applied in subsequent reactions with comparable activity.
Rhodium(III) iodide hydrate catalyzed three-component coupling reaction: synthesis of α-aminonitriles from aldehydes, amines, and trimethylsilyl cyanide
作者:Anjoy Majhi、Sung Soo Kim、Santosh T. Kadam
DOI:10.1016/j.tet.2008.03.106
日期:2008.6
Aryl imines formed from aldehydes and amines undergo smoothly in situ nucleophilic addition with trimethylsilyl cyanide (TMSCN) in the presence of catalytic amount of hydrated rhodium(III) iodide to afford the corresponding α-aminonitriles in excellent yield. The low catalytic loading (2 mol %), mild experimental conditions, and short reaction time (mostly within 13 min) represent the key features
Catalyst-Free Strecker Reaction in Water: A Simple and Efficient Protocol Using Acetone Cyanohydrin as Cyanide Source
作者:Paola Galletti、Matteo Pori、Daria Giacomini
DOI:10.1002/ejoc.201100089
日期:2011.7
nitriles through a one-pot, three-componentStreckerreaction of a carbonyl compound, amine, and acetone cyanohydrin in water has been developed. Reactions proceed very efficiently without any catalyst at room temperature with high chemoselectivity and give, in some cases, the expected α-amino nitrile pure after direct separation from water. The protocol is particularly efficient for both aliphatic and
TITANIUM COMPOUNDS AND PROCESS FOR CYANATION OF IMINES
申请人:Seayad Abdul Majeed
公开号:US20110319629A1
公开(公告)日:2011-12-29
The present invention relates to titanium catalysts for synthesis reactions produced by bringing a reaction mixture comprising a titanium alkoxide and a ligand in contact with water, wherein the ligand is represented by the general formula (e): wherein R
1
, R
2
, R
3
, and R
4
are independently a hydrogen atom, an alkyl group, or the like, and (A) represents a group with two or more carbon atoms. The titanium catalysts may be isolated in solid form and may be stored. The invention further relates to a process for cyanation of imines, wherein the process comprises reacting an imine with a cyanating agent in the presence of the titanium catalyst.
An iridium-catalyzed reductive nucleophilicaddition to secondary amides is reported. After the iridium-catalyzed reduction, the resulting imines can undergo the Strecker reaction, the Mannich reaction, allylation, and [3 + 2]-cycloaddition. The method shows high chemoselectivity in the presence of other functional groups such as methyl ester.