Aminoborohydrides 15. The First Mild and Efficient Method for Generating 2-(Dialkylamino)-pyridines from 2-Fluoropyridine
摘要:
[GRAPHICS]Lithium aminoborohyd ride (LAB) reagents promote the amination of 2-fluoropyridine under mild reaction conditions, providing 2-(dialkylamino)pyridines in excellent yield and purity. Treatment of 2-fluoropyridine with 1.1 equiv of lithium aminoborohydride at room temperature affords complete conversion after 1 h. This is the first general way by which 2-(dialkylamino)pyridines may be directly obtained from fluoropyridines under ambient reaction conditions. 2-Chloropyridine can also be converted to 2-(dialkylamino)pyridine by simply increasing the number of LAB equivalents and the reaction temperature.
Nickel-catalyzed cross-coupling of aryltrimethylammonium triflates and amines
作者:Xue-Qi Zhang、Zhong-Xia Wang
DOI:10.1039/c3ob41989d
日期:——
Nickel-catalyzed cross-coupling of aryltrimethylammonium triflates and amines was carried out under mild conditions. The reaction has a broad scope of substrates and can be performed by a one-pot procedure from an aryldimethylamine.
The amination of 2‐pyridine‐ and 8‐quinolinesulfonic acids using magnesium amides is reported. Various amides reacted with N‐heterocyclic sulfonic acids, leading to aminopyridines and aminoquinolines in up to 98 % yield. Various amines important in medicinal chemistry, such as the antidepressant amoxapine, were suitable for these aminations.
Ruthenium-Catalyzed α-(Hetero)Arylation of Saturated Cyclic Amines: Reaction Scope and Mechanism
作者:Aldo Peschiulli、Veerle Smout、Thomas E. Storr、Emily A. Mitchell、Zdeněk Eliáš、Wouter Herrebout、Didier Berthelot、Lieven Meerpoel、Bert U. W. Maes
DOI:10.1002/chem.201204438
日期:2013.7.29
3‐ethyl‐3‐pentanol. A systematic study on the substrate and reagent scope of this transformation is disclosed in this paper. The effect of substitution on both the piperidine ring and the arylboronic ester has been investigated. Smaller (pyrrolidine) and larger (azepane) saturated ring systems, as well as benzoannulated derivatives, were found to be compatible substrates with the α‐arylation protocol. The successful
Catalytic reactions which involve the cleavage of an sp(3) C-H bond adjacent to a nitrogenatom in N-2-pyridynyl alkylamines are described. The use of Ru(3)(CO)(12) as the catalyst results in the addition of the sp(3) C-H bond across the alkene bond to give the coupling products. A variety of alkenes, including terminal, internal, and cyclic alkenes, can be used for the coupling reaction. The presence
Synthesis of aminopyridines from 2-fluoropyridine and lithium amides
作者:Lubov Pasumansky、Armando R. Hernández、Soya Gamsey、Christian T. Goralski、Bakthan Singaram
DOI:10.1016/j.tetlet.2004.06.132
日期:2004.8
Lithiumamides promote the amination of 2-fluoropyridine under mild reaction conditions, providing 2-aminopyridines in good yields and purity. Treatment of 2-fluoropyridine with 1 equiv of lithium amide at room temperature affords complete conversion after 2 h. To our knowledge, this is the first study of lithium amide-promoted amination of fluoropyridines that are not further activated by electron-withdrawing