α-alkylation of unactivated amides with alcohols is described. Using a NCP-type pincer Ir complex as the precatalyst and KOtBu as the base, the reactions of secondary or tertiary acetamides with benzyl or nonbenzyl primary alcohols occur at 80 °C, furnishing the alkylation products in good yields. This method represents a practical and green means of α-alkylation of amides in a relatively mild, efficient
描述了未活化酰胺与醇的α-烷基化。使用NCP型夹钳Ir络合物作为前催化剂,并使用KO t Bu作为碱,仲或叔乙酰胺与苄基或非苄基伯醇的反应在80°C发生,提供了高收率的烷基化产物。该方法代表了以相对温和,有效和选择性的方式以低催化剂负载量(0.5mol%)进行酰胺的α-烷基化的实用和绿色手段。
Geometry-Constrained <i>N</i>,<i>N</i>,<i>O</i>-Nickel Catalyzed α-Alkylation of Unactivated Amides via a Borrowing Hydrogen Strategy
作者:Xue Yang、Xiaoyu Tian、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu、Liqun Jin
DOI:10.1021/acs.organomet.2c00470
日期:2023.1.9
geometry-constrained tridentate N,N,O-nickel complex for selective α-alkylation of unactivated amides using readily available alcohols as the alkylating reagents. The newly developed transformation could accommodate a broad substrate scope including various substituted benzylic or aliphatic alcohols and tertiary/secondary acyclic amides or lactams. The tolerance of methanol and ethanol in this protocol provided a novel
DIHYDROCAFFEIC ACID AMIDE DERIVATIVE AND APPLICATION THEREOF AS MEDICINE
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0495998A1
公开(公告)日:1992-07-29
A medicine for treating central nervous system diseases containing a dihydrocaffeic acid amide derivative represented by general formula (I), which has an activity of inducing a nerve growth factor and is efficacious in treating or preventing the progression of central nervous system diseases.