An efficient FeCl3-catalyzed amidation reaction of secondary benzylic and allylic alcohols with carboxamides or p-toluenesulfonamide
作者:Umasish Jana、Sukhendu Maiti、Srijit Biswas
DOI:10.1016/j.tetlet.2007.11.176
日期:2008.1
A simple, inexpensive, environmentally friendly and high yielding amidationreaction of benzylic and allylic alcohols with primary amides using a catalytic amount of FeCl3 (5 mol %) is described. Direct substitution of various amides such as benzamide, sulfonamide, acetamide and acrylamide is reported, and this method also works on a large scale in high yield.
A Lewis Acid Palladium(II)-Catalyzed Three-Component Synthesis of α-Substituted Amides
作者:Tamara Beisel、Georg Manolikakes
DOI:10.1021/ol402949t
日期:2013.12.6
A Lewis acid palladium-catalyzed reaction of amides, aryl aldehydes, and arylboronic acids is described. This new method allows for a practical and generalsynthesis of α-substituted amides from simple, readily available building blocks.
Three-Component Synthesis of Amine Derivatives Using Benzylic and Allylic Alcohols as<i>N</i>-Alkylating Agents in the Absence of External Catalysts and Additives
作者:Hai-Hua Li、De-Jun Dong、Shi-Kai Tian
DOI:10.1002/ejoc.200800465
日期:2008.7
The direct employment of benzylic and allylic alcohols as N-alkylating agents provides a useful synthetic route for amine derivatives by avoiding the preactivation of the hydroxygroups of alcohols. Herein we report a novel by-product-catalyzed three-component synthesis of amine derivatives from readily available benzylic and allylic alcohols, acyl chlorides (chloroformates or sulfonyl chlorides),
Reactions between various benzyl alcohols or tert-butyl alcohol and nitriles were carried out in the presence of catalytic amounts (usually 10–20 mol-%) of o-benzenedisulfonimide as a Bronsted acidcatalyst; the reaction conditions were mild and the yields of amides were good. The catalyst was easily recovered and purified, ready to be used in further reactions, with economic and ecological advantages
Air-stable Bis(pentamethylcyclopentadienyl) Zirconium Perfluorooctanesulfonate as an Efficient and Recyclable Catalyst for the Synthesis of N-substituted Amides
Bis(pentamethylcyclopentadienyl) zirconium perfluorooctanesulfonate is an air‐stable and water‐tolerant Lewis acid. This complex exhibited good thermal stability and high solubility in polar organic solvents. The compound showed relatively strong acidity, with an acid strength of 0.8