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Synthesis of Quinolines via a Metal-Catalyzed Dehydrogenative N-Heterocyclization.

Chemical record (New York, N.Y.)

Chelucci G, Porcheddu A.
PMID: 27524555
Chem Rec. 2017 Feb;17(2):200-216. doi: 10.1002/tcr.201600083. Epub 2016 Aug 15.

Efficient ruthenium-, rhodium-, palladium-, copper- and iridium-catalysed methodologies have been recently developed for the synthesis of quinolines by the reaction of 2-aminobenzyl alcohols with carbonyl compounds (aldehydes and ketones) or the related alcohols. The reaction is assumed to proceed...

Traceless Directing-Group Strategy in the Ru-Catalyzed, Formal [3 + 3] Annulation of Anilines with Allyl Alcohols: A One-Pot, Domino Approach for the Synthesis of Quinolines.

Organic letters

Kumar GS, Kumar P, Kapur M.
PMID: 28448156
Org Lett. 2017 May 19;19(10):2494-2497. doi: 10.1021/acs.orglett.7b00715. Epub 2017 Apr 27.

A unique, ruthenium-catalyzed, [3 + 3] annulation of anilines with allyl alcohols in the synthesis of substituted quinolines is reported. The method employs a traceless directing group strategy in the proximal C-H bond activation and represents a one-pot Domino...

Catalytic asymmetric hydrogenation of quinoline carbocycles: unusual chemoselectivity in the hydrogenation of quinolines.

Chemical communications (Cambridge, England)

Kuwano R, Ikeda R, Hirasada K.
PMID: 25847758
Chem Commun (Camb). 2015 May 01;51(35):7558-61. doi: 10.1039/c5cc01971k.

The reduction of quinolines selectively took place on their carbocyclic rings to give 5,6,7,8-tetrahydroquinolines, when the hydrogenation was conducted in the presence of a Ru(η(3)-methallyl)2(cod)-PhTRAP catalyst. The chiral ruthenium catalyst converted 8-substituted quinolines into chiral 5,6,7,8-tetrahydroquinolines with up to...

Coupling Radical Homoallylic Expansions with C-C Fragmentations for the Synthesis of Heteroaromatics: Quinolines from Reactions of o-Alkenylarylisonitriles with Aryl, Alkyl, and Perfluoroalkyl Radicals.

The Journal of organic chemistry

Evoniuk CJ, Gomes GDP, Ly M, White FD, Alabugin IV.
PMID: 28357857
J Org Chem. 2017 Apr 21;82(8):4265-4278. doi: 10.1021/acs.joc.7b00262. Epub 2017 Apr 03.

Selective addition of radicals to isonitriles can be harnessed for initiating reaction cascades designed to overcome the stereoelectronic restrictions on homoallylic ring expansion in alkyne reactions and to develop a new general route for the preparation of N-heteroaromatics. This...

Calcium Hydride Catalyzed Highly 1,2-Selective Pyridine Hydrosilylation.

Chemistry (Weinheim an der Bergstrasse, Germany)

Intemann J, Bauer H, Pahl J, Maron L, Harder S.
PMID: 26120024
Chemistry. 2015 Aug 03;21(32):11452-61. doi: 10.1002/chem.201501072. Epub 2015 Jun 26.

Reaction of the calcium hydride complex (DIPPnacnac-CaH⋅THF)2 with pyridine is much faster and selective than that of the corresponding magnesium hydride complex (DIPPnacnac = [(2,6-iPr2 C6 H3 )NC(Me)]2 CH). With a range of pyridine, picoline and quinoline substrates, exclusive...

Synthesis and Characterization of Iron-Nitrogen-Doped Graphene/Core-Shell Catalysts: Efficient Oxidative Dehydrogenation of N-Heterocycles.

Journal of the American Chemical Society

Cui X, Li Y, Bachmann S, Scalone M, Surkus AE, Junge K, Topf C, Beller M.
PMID: 26230874
J Am Chem Soc. 2015 Aug 26;137(33):10652-8. doi: 10.1021/jacs.5b05674. Epub 2015 Aug 11.

An important goal for nanocatalysis is the development of flexible and efficient methods for preparing active and stable core-shell catalysts. In this respect, we present the synthesis and characterization of iron oxides surrounded by nitrogen-doped-graphene shells immobilized on carbon...

Synthesis of pyrrolo[1,2-a]quinolines and ullazines by visible light mediated one- and twofold annulation of N-arylpyrroles with arylalkynes.

Chemical communications (Cambridge, England)

Das A, Ghosh I, König B.
PMID: 27333456
Chem Commun (Camb). 2016 Jul 05;52(56):8695-8. doi: 10.1039/c6cc04366f.

1-(2-Bromophenyl)-1H-pyrrole and 1-(2,6-dibromophenyl)-1H-pyrrole react in the presence of catalytic amounts of rhodamine 6G () and N,N-diisopropylethylamine (DIPEA) under blue light irradiation with aromatic alkynes and subsequently cyclize intramolecularly to form pyrrolo[1,2-a]quinoline and ullazines. The reactions proceed at room temperature,...

Ruthenium-Catalyzed Dehydrogenative β-Benzylation of 1,2,3,4-Tetrahydroquinolines with Aryl Aldehydes: Access to Functionalized Quinolines.

Organic letters

Tan Z, Jiang H, Zhang M.
PMID: 27300088
Org Lett. 2016 Jul 01;18(13):3174-7. doi: 10.1021/acs.orglett.6b01390. Epub 2016 Jun 14.

A new benzylation protocol, enabling straightforward access to β-benzylated quinolines, has been demonstrated. By employing readily available [RuCl2(p-cymene)]2 as a catalyst and O2 as a sole green oxidant, various 1,2,3,4-tetrahydroquinolines were efficiently converted in combination with aryl aldehydes into...

Evaluation of the electronic properties of perfluorophenyl functionalized quinolines and their hybrids with carbon nanostructures.

Physical chemistry chemical physics : PCCP

Sygellou L, Kakogianni S, Andreopoulou AK, Theodosiou K, Leftheriotis G, Kallitsis JK, Siokou A.
PMID: 26781962
Phys Chem Chem Phys. 2016 Feb 07;18(5):4154-65. doi: 10.1039/c5cp06016h.

Hybrid materials based on perfluorophenyl functionalized quinolines directly attached onto the sp(2) hybridized surface of carbon nanostructures have been prepared and studied herein along with their precursor semiconducting small molecules. Tails of different polarities have been used so that...

Trivalent Zirconium and Hafnium Metal-Organic Frameworks for Catalytic 1,4-Dearomative Additions of Pyridines and Quinolines.

Journal of the American Chemical Society

Ji P, Feng X, Veroneau SS, Song Y, Lin W.
PMID: 29041776
J Am Chem Soc. 2017 Nov 08;139(44):15600-15603. doi: 10.1021/jacs.7b09093. Epub 2017 Oct 25.

We report the quantitative conversion of [M

Rearrangements of 4-Quinolylcarbene, 3-Quinolylcarbene, and 2-Quinolylcarbene to 1-Naphthylnitrene and Cyanoindenes by Falling Solid Flash Vacuum Pyrolysis.

The Journal of organic chemistry

Aylward N, Kvaskoff D, Becker J, Wentrup C.
PMID: 27152548
J Org Chem. 2016 Jun 03;81(11):4609-15. doi: 10.1021/acs.joc.6b00444. Epub 2016 May 13.

The relationship between 4-quinolylcarbene 17, 3-quinolylcarbene 21, 2-quinolylcarbene 25, and 1-naphthylnitrene 35 has been explored experimentally and computationally. The diazomethylquinolines generated from (5-tetrazolyl)quinolines or 1,2,3-triazolo[1,5-a]quinoline by conventional flash vacuum pyrolysis (FVP) were observed by IR spectroscopy. The carbenes were...

Metal- and Protection-Free [4 + 2] Cycloadditions of Alkynes with Azadienes: Assembly of Functionalized Quinolines.

Organic letters

Saunthwal RK, Patel M, Verma AK.
PMID: 27119774
Org Lett. 2016 May 06;18(9):2200-3. doi: 10.1021/acs.orglett.6b00817. Epub 2016 Apr 27.

A base promoted, protection-free, and regioselective synthesis of highly functionalized quinolines via [4 + 2] cycloaddition of azadienes (generated in situ from o-aminobenzyl alcohol) with internal alkynes has been discovered. The reaction tolerates a wide variety of functional groups...

Showing 1 to 12 of 720 entries