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.
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),
Herein, we report the redox‐neutral, intermolecular, and highly branch‐selectiveamidation of allylicC−H bonds enabled by Cp*IrIII catalysis. A variety of readily available carboxylic acids were converted into the corresponding dioxazolones and efficiently coupled with terminal and internal olefins in high yields and selectivities. Mechanistic investigations support the formation of a nucleophilic
在本文中,我们报道了由Cp * Ir III催化实现的烯丙基CH键的氧化还原中性,分子间和高度分支选择性酰胺化。将各种容易获得的羧酸转化为相应的二恶唑酮,并以高收率和选择性将其与末端和内部烯烃有效偶联。机理研究支持亲核性Ir III-烯丙基中间体的形成,而不是将Ir-nitrenoid物种直接插入烯丙基CH键中。
α-Amidobenzylation of Aryl and Alkenyl Halides via Palladium-catalyzed Suzuki–Miyaura Coupling with α-(Acylamino)benzylboronic Esters
The Suzuki–Miyaura coupling of α-(acetylamino)benzylboronic esters with aryl and alkenyl halides has been achieved using a Pd/P(t-Bu)3 catalyst with KF and H2O in 1,4-dioxane, giving α-substituted benzylamines in high yields.