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。
Efficient Iron-Catalyzed Tsuji-Trost Coupling Reaction of Aromatic Allylic Amides through a sp³-Carbon-Nitrogen Breaking
The catalytic activation of sp³-carbon-nitrogen of allylic amides is generally difficult because of the inefficient leaving-group ability of the amide group. In this article, we have discovered for the first time that FeCl3-catalyzed Tsuji-Trost coupling reaction of aromatic allylic amides with active methylene compounds, cyclohexanone, and allytrimethylsilane work efficiently under mild conditions.