Metal-free synthesis of allylic amines by cross-dehydrogenative-coupling of 1,3-diarylpropenes with anilines and amides under mild conditions
作者:Zhiming Wang、Hanjie Mo、Dongping Cheng、Weiliang Bao
DOI:10.1039/c2ob06826e
日期:——
Dehydrogenative cross-coupling reaction of primary anilines, secondary anilines, carboxamides, and sulfonamides with 1,3-diarylpropenes to form a series of allylic amines promoted by DDQ have been realized. Both monoallylation and diallylation products can be selectively synthesized when primary anilines are used as the starting materials. The method may provide a wide scope of allylamines in scientific research including biologically active compound library construction.
Amidation of 1,3-Diarylallylic Compounds Catalysed by 2,3-Dichloro-5,6-Dicyano-1,4-Benzoquinone with Molecular Oxygen as the Terminal Oxidant
作者:Dongping Cheng、Xiayi Zhou、Kun Yuan、Jizhong Yan
DOI:10.3184/174751916x14537221307662
日期:2016.3
An efficient amidation has been developed of 1,3-diarylpropenes by carboxamides, sulfonamides, carbamates and anilines catalysed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and benzoyl peroxide with molecular oxygen. The corresponding products were obtained in moderate to good yields.
Directaminations of allylic alcohols, benzylic alcohols, and benzhydrols with electron‐withdrawing (F, Br, I, NO2, or CN) substituents were efficiently catalyzed by aluminumtriflate [Al(OTf)3] to afford the corresponding biarylamines in high yield, and the dibromo‐substituted product was further transformed into letrozole.
The first example of simple Re2O7-catalyzed direct dehydrative coupling between allylic alcohols with electron-deficient amines has been achieved under mild and open flask conditions. The protocol has also been successfully applied to benzylic and propargylic alcohols. The mechanistic proof for the SN1-type process has also been provided.
在温和和开放的烧瓶条件下,已经实现了烯丙基醇与缺电子的胺之间简单的Re 2 O 7催化的直接脱水偶合的第一个例子。该协议也已成功应用于苄醇和炔丙基醇。还提供了用于S N 1型过程的机理证明。