通过使用芳基硼酸,过氧化氢(H 2 O 2)和苄基卤化物的组合的一锅合成方案,已经成功地开发了制备苄基苯基醚的有效合成途径。整个过程包括两个连续的反应,由芳基硼酸形成苯氧硼及其亲核攻击。已经采用了在温和条件下的简单操作,例如室温离子液体(氢氧化胆碱),有氧环境以及不存在金属和碱催化剂。也成功地完成了利用替代代苯甲酸苄酯的扩展。
Choline Hydroxide as a Versatile Medium for Catalyst‐Free
<i>O</i>
‐Functionalization of Phenols
作者:Gyu‐Tae Kwon、Seong‐Ryu Joo、Soo‐Youl Park、Seung‐Hoi Kim
DOI:10.1002/bkcs.12138
日期:2020.12
A versatile synthetic protocol for benzyl phenyl ether preparation via O‐alkylation of phenolic oxygen with readily available benzylderivatives was demonstrated. The newly designed procedure was carried out using an eco‐friendly medium, room‐temperature ionic liquid (choline hydroxide), under metal‐ and base‐catalyst‐free aerobic conditions. The reaction platform was also successfully applied to phenol
catalyzed C–O bond cleavage leading to the preparation of functional esters in the presence of N-methylpyrrolidin-2-one (NMP) was accomplished. Various substrates were well tolerated, and a gram-scale experiment was successfully realized. DFT calculations indicated that NMP plays a decisive role in accelerating nucleophilic attack of the functional acid to generate the functional esters in chlorobenzene
Potassium <i>tert</i>-Butoxide-Mediated Condensation Cascade Reaction: Transition Metal-Free Synthesis of Multisubstituted Aryl Indoles and Benzofurans
作者:Pengfei Yang、Weiyan Xu、Rongchao Wang、Min Zhang、Chunsong Xie、Xiaofei Zeng、Min Wang
DOI:10.1021/acs.orglett.9b01093
日期:2019.5.17
tert-butoxide-mediated condensation reactioninvolving a vinyl sulfoxide intermediate. Products are obtained from N- or O-benzyl benzaldehydes using dimethyl sulfoxide as a carbon source. The methodology features a wide functional group tolerance and transition metal-free environment. Preliminary mechanistic studies suggest that the reactioninvolves a tandem aldol reaction/Michaeladdition/dehydrosulfenylation/isomerization
[EN] DIBENZYLAMINES AS AMINO ACID TRANSPORT INHIBITORS<br/>[FR] DIBENZYLAMINES UTILISABLES COMME INHIBITEURS DU TRANSPORT DES ACIDES AMINÉS
申请人:UNIV VANDERBILT
公开号:WO2020252336A1
公开(公告)日:2020-12-17
These compounds are amino acid transporter inhibitors. Amino acid transporter inhibitors are useful to treat a variety of diseases disorders, or conditions including cancer.
这些化合物是氨基酸转运体抑制剂。氨基酸转运体抑制剂可用于治疗多种疾病、失调或病况,包括癌症。
[EN] PYRROLIDINEAMIDE DERIVATIVES AND USES THEREOF<br/>[FR] DÉRIVÉS DE PYRROLIDINEAMIDE ET LEURS UTILISATIONS
申请人:SUNSHINE LAKE PHARMA CO LTD
公开号:WO2019170115A1
公开(公告)日:2019-09-12
Provided a pyrrolidineamide compound and a pharmaceutical composition containing this compound which can be used as a MAO-B inhibitor. Also provided methods of preparing this compound and pharmaceutical composition, and their use in the manufacture of a medicament for treating a disease regulated by MAO-B comprising a neurodegenerative disease, especially Parkinson's disease.