Cobalt-Catalyzed Silylcarbonylation of Unactivated Secondary Alkyl Tosylates at Low Pressure
作者:Joan E. Roque Peña、Erik J. Alexanian
DOI:10.1021/acs.orglett.7b02117
日期:2017.9.1
catalytic preparation of silyl enol ethers from unactivated secondary alkyl tosylates is reported. An inexpensive cobalt catalyst is used under mild conditions with low pressures of carbonmonoxide. Nucleophilic, anionic cobaltcarbonyls facilitate the catalytic activation of a range of alkyl tosylates. The silylcarbonylation offers a practical approach to synthetically valuable silyl enol ethers from simple
Copper-Catalyzed Cross-Coupling of Nonactivated Secondary Alkyl Halides and Tosylates with Secondary Alkyl Grignard Reagents
作者:Chu-Ting Yang、Zhen-Qi Zhang、Jun Liang、Jing-Hui Liu、Xiao-Yu Lu、Huan-Huan Chen、Lei Liu
DOI:10.1021/ja304848n
日期:2012.7.11
Practical catalytic cross-coupling of secondary alkyl electrophiles with secondary alkyl nucleophiles under Cu catalysis has been realized. The use of TMEDA and LiOMe is critical for the success of the reaction. This cross-coupling reaction occurs via an S(N)2 mechanism with inversion of configuration and therefore provides a general approach for the stereocontrolled formation of C-C bonds between
已经实现了在铜催化下仲烷基亲电试剂与仲烷基亲核试剂的实际催化交叉偶联。TMEDA 和 LiOMe 的使用对于反应的成功至关重要。这种交叉偶联反应通过构型反转的 S(N)2 机制发生,因此为手性仲醇的两个叔碳之间立体控制形成 CC 键提供了通用方法。
Imidazolium salts, intermediates thereto and their use
申请人:SCHERING AKTIENGESELLSCHAFT
公开号:EP0131302A2
公开(公告)日:1985-01-16
The imidazolium salts described are useful as antiarrhythmic agents. A method of treating arrhythmia by increasing the refractoriness of cardiac tissue is provided as well as pharmaceutical formulations containing such imidazolium salts.