- Potassium tert-Butoxide-Promoted Acceptorless Dehydrogenation of N-Heterocycles
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Potassium tert-butoxide-promoted acceptorless dehydrogenation of N-heterocycles was efficiently realized for the generation of N-heteroarenes and hydrogen gas under transition-metal-free conditions. In the presence of KOtBu base, a variety of six- and five-membered N-heterocyclic compounds efficiently underwent acceptorless dehydrogenation to afford the corresponding N-heteroarenes and H2 gas in o-xylene at 140 °C. The present protocol provides a convenient route to aromatic nitrogen-containing compounds and H2 gas. (Figure presented.).
- Liu, Tingting,Wu, Kaikai,Wang, Liandi,Yu, Zhengkun
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supporting information
p. 3958 - 3964
(2019/08/01)
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- Acceptorless Dehydrogenation of N-Heterocycles and Secondary Alcohols by Ru(II)-NNC Complexes Bearing a Pyrazoyl-indolyl-pyridine Ligand
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Ruthenium(II) hydride complexes bearing a pyrazolyl-(2-indol-1-yl)-pyridine ligand were synthesized and structurally characterized by NMR analysis and X-ray single crystal crystallographic determinations. These complexes efficiently catalyzed acceptorless dehydrogenation of N-heterocycles and secondary alcohols, respectively, exhibiting highly catalytic activity with a broad substrate scope. The present work has established a strategy to construct highly active transition metal complex catalysts and provides an atom-economical and environmentally benign protocol for the synthesis of aromatic N-heterocyclic compounds and ketones.
- Wang, Qingfu,Chai, Huining,Yu, Zhengkun
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p. 584 - 591
(2018/03/08)
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- NOVEL QUINOLINE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS FOR PREVENTING OR TREATING CANCER CONTAINING THE SAME
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The present invention refers to an excellent cancer antiproliferative potency relative to the quinoline compounds, a pharmaceutically acceptable salt, or hydrate and, number of active ingredient containing bath method and pharmaceutical composition for the prevention or treatment of cancer disease relates to search, said present invention according to compound, a pharmaceutically acceptable salt thereof, or hydrate number and number and mutant kinase protein kinase activity number of excellent cancer billion billion number activity and thus, new anticancer number is useful as the effective component can be. (by machine translation)
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Paragraph 0147-0148; 0155; 0164-0166
(2017/11/10)
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- Highly Enantioselective Direct Synthesis of Endocyclic Vicinal Diamines through Chiral Ru(diamine)-Catalyzed Hydrogenation of 2,2′-Bisquinoline Derivatives
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An asymmetric hydrogenation of 2,2′-bisquinoline and bisquinoxaline derivatives, catalyzed by chiral cationic ruthenium diamine complexes, was developed. A broad range of chiral endocyclic vicinal diamines were obtained in high yields with excellent diastereo- and enantioselectivity (up to 93:7 dl/meso and >99 % ee). These chiral diamines could be easily transformed into a new class of chiral N-heterocyclic carbenes (NHCs), which are important but difficult to access.
- Ma, Wenpeng,Zhang, Jianwei,Xu, Cong,Chen, Fei,He, Yan-Mei,Fan, Qing-Hua
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supporting information
p. 12891 - 12894
(2016/10/04)
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- Design, synthesis, in-vitro antiproliferative activity and kinase profile of new picolinamide based 2-amido and ureido quinoline derivatives
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Abstract New 2-amido and ureido quinoline derivatives substituted with 2-N-methylamido-pyridin-4-yloxy group at the 5-position of quinoline (18 final compounds) have been designed and synthesized as anticancer sorafenib congeners. Among the synthesized de
- El-Damasy, Ashraf Kareem,Seo, Seon Hee,Cho, Nam-Chul,Kang, Soon Bang,Pae, Ae Nim,Kim, Key-Sun,Keum, Gyochang
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p. 754 - 768
(2015/08/06)
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- The effects of intramolecular hydrogen bonding on the reactivity of phenoxyl radicals in model systems
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The effects of hydrogen bonding and spin density at the oxygen atom on the gas-phase reactivity of phenoxyl radicals were investigated experimentally and theoretically in model systems and the dipeptide LysTyr. Gas-phase ion-molecule reactions were carried out between radical cations of several aromatic nitrogen bases with the neutrals nitric oxide and n-propyl thiol. Reactivity of radical cations 4-6 correlated with the spin density. The possibility of hydrogen bonding was explored in compounds which allowed four-, five-, and six-membered rings to be formed between the protonated nitrogen and the phenoxyl oxygen, while possessing similar spin density at the oxygen atom. The N+-H?O? bond length was calculated to decrease in the series (1-3), consistent with the theoretical calculations finding weak hydrogen bonding in 2 and strong hydrogen bonding in 3. This coincided with the decrease in reaction rates of 1-3 with both nitric oxide and n-propyl thiol. DFT calculations found that the lowest energy structure of the distonic radical cation of the dipeptide [LysTyr(O)?]+ has a short hydrogen bond between the protonated Lys side chain and the phenoxyl oxygen, 1.70 ?, which is consistent with its low reactivity.
- Lesslie, Michael,Piatkivskyi, Andrii,Lawler, John,Helgren, Travis R.,Osburn, Sandra,O'Hair, Richard A.J.,Ryzhov, Victor
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p. 124 - 131
(2015/10/20)
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- Synthesis and in vivo evaluation of 5-methoxy-2-(phenylethynyl)quinoline (MPEQ) and [11C]MPEQ targeting metabotropic glutamate receptor 5 (mGluR5)
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The synthesis and in vivo evaluation of 5-methoxy-2-(phenylethynyl) quinoline (MPEQ) 3 as a potential mGluR5 selective radioligand is described. We have identified MPEQ 3 exhibiting the analgesic effect in the neuropathic pain animal model. The effect of mGluR5 on neuronal activity in rat brain was evaluated through FDG/PET imaging in the presence of MPEQ 3. In addition, the PET study of [11C]MPEQ 3 proved that accumulation of [ 11C]MPEQ 3 in rat brain was correlated to the localization of the mGluR5.
- Kim, Ji Young,Son, Myung-Hee,Choi, Kihang,Baek, Du-Jong,Ko, Min Kyung,Lim, Eun Jeong,Pae, Ae Nim,Keum, Gyochang,Lee, Jae Kyun,Cho, Yong Seo,Choo, Hyunah,Lee, Youn Woo,Moon, Byung Seok,Lee, Byung Cheol,Lee, Ho-Young,Min, Sun-Joon
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p. 2304 - 2310
(2014/11/12)
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- Synthesis and biological evaluation of 2-(arylethynyl)quinoline derivatives as mGluR5 antagonists for the treatment of neuropathic pain
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We described here the synthesis and biological evaluation of mGluR5 antagonists containing a quinoline ring structure. Using intracellular calcium mobilization assay (FDSS assay), we identified compound 5n, showing high inhibitory activity against mGluR5. In addition, it was found that compound 5n has excellent stability profile. Finally, this compound exhibited favorable analgesic effects in spinal nerve ligation model of neuropathic pain, which is comparable to gabapentin.
- Son, Myung-Hee,Kim, Ji Young,Lim, Eun Jeong,Baek, Du-Jong,Choi, Kihang,Lee, Jae Kyun,Pae, Ae Nim,Min, Sun-Joon,Cho, Yong Seo
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supporting information
p. 1472 - 1476
(2013/03/28)
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- Synthesis of 8-arylquinolines via one-pot Pd-catalyzed borylation of quinoline-8-yl halides and subsequent Suzuki-Miyaura coupling
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A one-pot process has been developed for the synthesis of 8-arylquinolines via Pd-catalyzed borylation of quinoline-8-yl halides and subsequent Suzuki-Miyaura coupling with aryl halides using n-BuPAd2 as ligand. Yields of up to 98% were obtaine
- Zhang, Yongda,Gao, Joe,Li, Wenjie,Lee, Heewon,Lu, Bruce Z.,Senanayake, Chris H.
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supporting information; experimental part
p. 6394 - 6400
(2011/10/01)
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- A practical route to quinolines from anilines
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A practical route to quinoline from anilines through acid-mediated cyclization of 3-(N-aryl-N-sulfonylamino)propionaldehydes has been developed. Treatment of the cyclization products, dihydroquinoline intermediates with KOH in DMSO leads to substituted quinolines.
- Tokuyama, Hidetoshi,Sato, Masashi,Ueda, Toshihiro,Fukuyama, Tohru
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p. 105 - 108
(2007/10/03)
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- Friedlaender Synthesis of Substituted Quinolines from N-Pivaloylanilines
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Synthesis of a great variety of quinoline derivatives has been developed by lithiation of N-pivaloylanilines with sec-BuLi, formylation with DMF, and subsequent condensation with active methylene groups of aldehydes or ketones (KHMDS).The pivaloyloxy group is eliminated during one-pot procedure in most cases.The scope of the reaction has been studied, showing that the method is limited by the nature of intermediate compounds. - Keywords: Friedlaender synthesis; pivaloylanilines; quinolines; o-metalation; one-pot synthesis
- Ubeda, J. Ignacio,Villacampa, Mercedes,Avendano, Carmen
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p. 1176 - 1180
(2007/10/03)
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