A Multicomponent Coupling Sequence for Direct Access to Substituted Quinolines
摘要:
A titanium-catalyzed three-component coupling reaction can be used to generate tautomers of N-aryl-1,3-diimines. Simple treatment of these products with acetic acid leads to cyclization forming quinoline derivatives in a one-pot procedure. The primary amines employed can be substituted anilines, aminonaphthalenes, or even heterocyclic amines, which leads to a variety of fused-ring heterocyclic frameworks. The one-pot yields varied from 25-71% for the 18 examples presented in this study.
New C–N and C–C bond forming reactions catalyzed by titanium complexes
作者:Aaron L. Odom
DOI:10.1039/b415701j
日期:——
especially useful in generating active catalysts for hydroamination and hydrohydrazination. From these reactions, new methodologies for the synthesis of imines, hydrazones, alpha,beta-unsaturated imines, pyridines, indoles, and pyrroles have developed. In addition, a new reaction that is mechanistically related to hydroamination, alkyne iminoamination, has been discovered. Iminoamination, which is a
Pyrazole Synthesis Using a Titanium-Catalyzed Multicomponent Coupling Reaction and Synthesis of Withasomnine
作者:Supriyo Majumder、Kevin R. Gipson、Richard J. Staples、Aaron L. Odom
DOI:10.1002/adsc.200900293
日期:2009.8
coupling of an alkyne, isonitrile, and amine can be used to generate tautomers of 1,3-diimines. These diimines produced in situ undergo cyclization with hydrazine and hydrazine derivatives in a one-pot procedure to provide pyrazoles. Seventeen examples of pyrazoles are provided using this one-pot, 4-component procedure from simple starting materials. The regioselectivity of the alkyne addition can be
申请人:Board of Trustees of MICHIGAN STATE UNIVERSITY
公开号:US20040110983A1
公开(公告)日:2004-06-10
A process is described for producing one or more substituted iminoamines, in particular &bgr;-unsaturated &bgr;-iminoamines, in a single reaction comprising reacting one or more primary amines, alkynes, and isonitriles in the presence of a transition metal catalytic complex, preferably a titanium metal catalytic complex such as (N,N-di(pyrrolyl-&agr;-methyl)-N-methylamine)titanium (Ti(NMe
2
)
2
(dpma)), under reaction conditions effective for 3-component coupling of the primary amines, alkynes, and isonitriles to produce one or more of the substituted iminoamines.
Regioselective conversion of alkynes to 4-substituted and 3,4-disubstituted isoxazoles using titanium-catalyzed multicomponent coupling reactions
作者:Amila A. Dissanayake、Aaron L. Odom
DOI:10.1016/j.tet.2011.11.043
日期:2012.1
Conditions have been developed for the regioselective synthesis of 4-substituted isoxazoles from terminal alkynes and 3,4-disubstituted isoxazoles from internal alkynes. The methodology involves a one-pot titanium-catalyzedmulticomponentcouplingreaction followed by simple hydroxylamine hydrochloride addition.
Novel Stannylenes Stabilized with Diethylenetriamido and Related Amido Ligands: Synthesis, Structure, and Chemical Properties
作者:Mengmeng Huang、Marina M. Kireenko、El'mira Kh. Lermontova、Andrei V. Churakov、Yuri F. Oprunenko、Kirill V. Zaitsev、Denis Sorokin、Klaus Harms、Jörg Sundermeyer、Galina S. Zaitseva、Sergey S. Karlov
DOI:10.1002/zaac.201200552
日期:2013.3
diethylenetriamines 1–3 and relatedligands 4–6 were prepared from Lappert's stannylene, Sn[N(SiMe3)2]2, and the corresponding ligands. Reactivity of the stannylenes in insertion, oxidation and [1+4] cycloaddition reactions were studied. Composition and structures of the products were confirmed by elemental analyses and multinuclear (1H, 13C, 19F, and 119Sn) NMR spectroscopy. Crystal structures of the diethylenetriamines