METHOD FOR OXYGENATIVE COUPLING OF ALKYNES USING ACID CATALYST
申请人:INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
公开号:US20180282273A1
公开(公告)日:2018-10-04
The present disclosure relates to a method for preparing various physiologically active pharmaceutical ingredients, such as a 1,1-diaryl compound and a 1,1-diheteroaryl compound (specifically, a 1,1-diaryl carbonyl compound), in an economical and convenient manner under mild conditions without using an expensive transition metal catalyst by activating an alkyne compound (e.g., an ynamide) using a Brønsted acid as a catalyst to induce a reaction of the activated alkyne compound and a N—O bond oxidant to form an adduct intermediate and then inducing a coupling reaction of the adduct intermediate with various nucleophilic organic compounds (e.g., a nucleophilic arene compound).
Brønsted Acid Catalyzed Oxygenative Bimolecular Friedel–Crafts‐type Coupling of Ynamides
作者:Dilip V. Patil、Seung Woo Kim、Quynh H. Nguyen、Hanbyul Kim、Shan Wang、Tuan Hoang、Seunghoon Shin
DOI:10.1002/anie.201612471
日期:2017.3.20
A non‐metal approach for accessing α‐oxo carbene surrogates for a C−C bond‐forming bimolecularcoupling between ynamides and nucleophilic arenes was developed. This acid‐catalyzedcoupling features mild temperature, which is critical for the required temporal chemoselectivity among nucleophiles. The scope of nucleophiles includes indoles, pyrroles, anilines, phenols and silyl enolethers. Furthermore
开发了一种非金属的方法来获得α-氧代卡宾替代物,以实现酰胺和亲核芳烃之间形成C-C键的双分子偶联。这种酸催化的偶联具有适度的温度,这对于亲核试剂之间所需的时间化学选择性至关重要。亲核试剂的范围包括吲哚,吡咯,苯胺,苯酚和甲硅烷基烯醇醚。此外,通过使用手性N,N'-二氧化物提供了对S N 2'机理的直接测试,这也启发了相关金属催化过程中中间体的性质。
Enantioselective Strecker Reactions between Aldimines and Trimethylsilyl Cyanide Promoted by ChiralN,N′-Dioxides
Axially chiral N,N'-dioxide Lewis base promoters have been developed and have for the first time been applied to the asymmetric synthesis of alpha-amino nitriles through cyanide addition to aldimines. The chiral 3,3'-dimethyl-2,2'-biquinoline N,N'-dioxide 2 exhibited high enantioselectivity for asymmetric Streckerreactionsbetween N-benzhydrylimines and trimethylsilylcyanide. In the presence of 1
Metal carbonyl complexes containing heterocyclic nitrogen ligands
作者:Sergio A Moya、Juan Guerrero、Rubén Pastene、Ignacio Azócar-Guzmán、Alvaro J Pardey
DOI:10.1016/s0277-5387(01)01009-9
日期:2002.3
The fac-MnBr(CO)3(3,3-R-2,2-biquinoline) (R =CH3 and CH3; H and H; CH2CH2 or CH2CH2CH2) compounds were synthesized and characterized. The fac-conformation for the carbonyl complexes was established by IR spectroscopy. Conformational effects were investigated by means of 1 H NMR and UV–Vis spectroscopical and electrochemical properties and these properties were compared with related rhenium compounds