Aerobic C–N bond activation: a simple strategy to construct pyridines and quinolines
作者:Kun Wu、Zhiliang Huang、Chao Liu、Heng Zhang、Aiwen Lei
DOI:10.1039/c4cc08074b
日期:——
An attractive dioxygen induced C–N bond activation of primary alkyl amines was demonstrated toward the synthesis of pyridines and quinolines.
一种吸引人的二氧化碳诱导的初级烷基胺C-N键活化被证明可用于合成吡啶和喹啉。
Au-complex containing phosphino and imidazolyl moieties as a bi-functional catalyst for one-pot synthesis of pyridine derivatives
作者:Da Yang、Huan Liu、Dong-Liang Wang、Yong Lu、Xiao-Li Zhao、Ye Liu
DOI:10.1016/j.molcata.2016.09.008
日期:2016.12
The complex of Au-L1 containing imidazolyl ring and the phosphine-ligated-Au moiety was synthesized and applied as the efficient bi-functional catalyst for the one-pot sequential condensation/annulation reaction for the synthesis of pyridine derivatives. It was found that, as for Au-L1, the involved imidazolyl group acted as a Lewis base to catalyze the condensation of carbonyl compounds with propargylamine to form the imino intermediate, and the involved Au+-complex species with alkynophilicity corresponded to the subsequent activation of imino-tailed alkynyl to afford dehydropyridine intermediate. The latter proceeded auto-oxidation reaction to afford the pyridine derivatives. The observed sequential catalysis over Au-L1 proved more efficient than that over the mechanical mixtures of the Au-complex (Au-L2) and N-methylimidazole, because the free N-methylimidazole as an N-containing donor competed with the alkyne substrate to coordinate to Au-center. Moreover, Au-L1 exhibited good generality to a wide range of the substrates for the synthesis of 2,3-fused pyridine derivatives and 2-aryl(heteroaryl)-substituted pyridines. (C) 2016 Elsevier B.V. All rights reserved.
US4169951A
申请人:——
公开号:US4169951A
公开(公告)日:1979-10-02
Sequential Amination/Annulation/Aromatization Reaction of Carbonyl Compounds and Propargylamine: A New One-Pot Approach to Functionalized Pyridines
作者:Giorgio Abbiati、Antonio Arcadi、Gabriele Bianchi、Sabrina Di Giuseppe、Fabio Marinelli、Elisabetta Rossi
DOI:10.1021/jo0347260
日期:2003.9.1
A general one-pot synthesis of pyridines 4a-t from the reaction of dialkyl acyclic/cyclic ketones 1a-i, methyl, aryl/heteroaryl ketones 1m-r, and aldehydes bearing alpha-hydrogens 1s,t with propargylamine 2 is described. Gold and copper salts are efficient catalysts for the reaction of ketones with 2. The formation of the pyridines 4 is suggested to proceed through the sequential amination of carbonyl
Process for the production of substituted pyridine (B)
申请人:Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
公开号:US04169951A1
公开(公告)日:1979-10-02
Pyridines substituted in the 2- and 3-positions by aromatic or heteroaromatic groups are prepared by reacting an aromatic or heteroaromatic substituted ketone which has at least one reactive methylene group adjacent to the keto group with an aliphatic oxo compound having a carbon to carbon ethylenic double bond on the carbon atom adjacent to the oxo group and ammonia in the presence of a dehydrating and dehydrogenating catalyst at a temperature of about 250.degree. to 550.degree. C.