Practical and efficient synthesis of aryl trifluoromethyl sulfones from arylsulfonyl chlorides with Umemoto’s reagent II
作者:Xiaocong Zhou、Dufen Hu、Xinyi He、Yuanqiang Li、Youqun Chu、Yuanbin She
DOI:10.1016/j.tetlet.2019.151465
日期:2020.1
A practical and efficient method for the synthesis of aryl trifluoromethyl sulfones has been developed by a tandem reaction of arylsulfonyl chlorides with Umemoto’s reagent II. The advantageous features of this method are simple operation, mild reaction conditions, wide scope of substrates, high yield of products, and easy scalability.
on of benzynes. The trifluoromethanesulfonyl group, one of the fluorinated functional groups, is a highly electron‐negative and mild lipophilic substituent. Aryl triflones have high potential in the synthesis of bioactive compounds and specialty materials. The treatment of 2‐(trimethylsilyl)aryl trifluoromethanesulfonates with cesium fluoride in the presence of 15‐crown‐5 generated benzynes, which
METHOD FOR PRODUCING 3-ARYLPROPIONAMIDE COMPOUND AND 3-ARYLPROPIONIC ACID ESTER COMPOUND
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20200165209A1
公开(公告)日:2020-05-28
The present invention provides a method for industrially producing: a pyrimidine compound having pest control efficacy; 2-[4-(trifluoromethyl)phenyl]ethylamine which is a production intermediate of the pyrimidine compound; a phenylethylamine compound useful as a pharmaceutical and agrochemical intermediate; and further a 3-arylpropionamide compound and a 3-arylpropionic acid ester compound useful as production intermediates of the phenylethylamine compound. The 3-arylpropionamide compound or the 3-arylpropionic acid ester compound can be efficiently and industrially produced in a single step by reacting a compound represented by formula (1)
(wherein X represents a chlorine atom or a bromine atom; and Y represents an alkyl group optionally substituted with fluorine atom(s), a hydrogen atom, a fluorine atom, a cyano group, an alkylcarbonyl group, a dialkylamino group, or the like) with acrylamide or an acrylic acid ester in the presence of a metal catalyst and a reducing agent.
Direct Intermolecular Aniline <i>Ortho-</i>Arylation via Benzyne Intermediates
作者:Thanh Truong、Olafs Daugulis
DOI:10.1021/ol302875x
日期:2012.12.7
A method for direct, transition-metal-free ortho-arylation of anilines by aryl chlorides, bromides, fluorides, and triflates has been developed. This methodology provides the most direct approach to 2-arylanilines since no protecting or directing groups on nitrogen are required. The arylation is functional-group tolerant, with alkene, ether, trifluoromethyl, dimethylamino, carbonyl, chloro, and cyano
已经开发了一种通过芳基氯化物、溴化物、氟化物和三氟甲磺酸酯对苯胺进行直接、不含过渡金属的邻位芳基化的方法。这种方法提供了最直接的 2-芳基苯胺方法,因为不需要氮上的保护或导向基团。芳基化是官能团耐受的,可以耐受烯烃、醚、三氟甲基、二甲氨基、羰基、氯和氰基官能团。对映体纯联萘二胺的苯基化提供具有>99% ee 的产物。
Method for producing 3-arylpropionamide compound and 3-arylpropionic acid ester compound
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US11028056B2
公开(公告)日:2021-06-08
The present invention provides a method for industrially producing: a pyrimidine compound having pest control efficacy; 2-[4-(trifluoromethyl)phenyl]ethylamine which is a production intermediate of the pyrimidine compound; a phenylethylamine compound useful as a pharmaceutical and agrochemical intermediate; and further a 3-arylpropionamide compound and a 3-arylpropionic acid ester compound useful as production intermediates of the phenylethylamine compound. The 3-arylpropionamide compound or the 3-arylpropionic acid ester compound can be efficiently and industrially produced in a single step by reacting a compound represented by formula (1)
(wherein X represents a chlorine atom or a bromine atom; and Y represents an alkyl group optionally substituted with fluorine atom(s), a hydrogen atom, a fluorine atom, a cyano group, an alkylcarbonyl group, a dialkylamino group, or the like) with acrylamide or an acrylic acid ester in the presence of a metal catalyst and a reducing agent.