- Selective synthesis of benzo[4,5]imidazo[2,1-a]isoquinolines via copper-catalyzed tandem annulation of alkynylbenzonitriles with 2-Iodoanilines
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An efficient copper-catalyzed cascade cyclization reaction for selectively synthesizing a variety of benzo[4,5]imidazo[2,1-a]isoquinoline derivatives has been developed. The reaction features the formation of three different C–N bonds in sequence. In the
- Liu, Xiaodong,Deng, Guobo,Liang, Yun
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p. 2844 - 2847
(2018/06/18)
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- A radical cyclization cascade of 2-alkynylbenzonitriles with sodium arylsulfinates
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A convenient radical cyclization cascade procedure for the construction of sulfonated indenones from 2-alkynylbenzonitriles and sodium arylsulfinates has been explored under mild reaction conditions. The present methodology offers a low-cost and operationally straightforward approach to synthesizing various sulfonated indenones in moderate to good yields by simple use of cheap sodium persulfate as an oxidant and environmentally benign water as a co-solvent.
- Zhou, Bang,Chen, Wenqi,Yang, Yuzhong,Yang, Yuan,Deng, Guobo,Liang, Yun
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p. 7959 - 7963
(2018/11/21)
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- Palladium-Catalyzed Ring-Forming Aminoalkenylation of Alkenes with Aldehydes Initiated by Intramolecular Aminopalladation
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A palladium-catalyzed aminopalladation reaction followed by nucleophilic addition with aldehydes and dehydration is described. This direct and operationally simple procedure provides a rapid and reliable approach to a wide range of functionalized tetrahydroisoquinolines with high selectivity. Mechanistic studies disclosed that the nucleophilic addition, performed via a highly ordered transition-state, is the turnover-limiting step in which the inherent β-hydride elimination of the key Csp3?Pd species was controlled by the confined conformation and the nucleophilicity of the Csp3?Pd bond was enhanced by the strong electron-donating effect of the nitrogen atom.
- Hu, Yue,Xie, Yinjun,Shen, Zhiqiang,Huang, Hanmin
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supporting information
p. 2473 - 2477
(2017/02/23)
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- Palladium-catalyzed highly selective ortho-halogenation (I, Br, Cl) of arylnitriles via sp2 C-H bond activation using cyano as directing group
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A palladium-catalyzed ortho-halogenation (I, Br, Cl) of arylnitrile is described. The optimal reaction conditions were identified after examining various factors such as catalyst, additive, solvent, and reaction temperature. Using cyano as the directing group, the halogenation reaction gave good to excellent yields. The method is compatible to the arylnitriles with either electron-withdrawing or electron-donating groups. The reaction is available to the substrate in at least gram scale. The present method was successfully applied to the synthesis of the precursors of paucifloral F and isopaucifloral F.
- Du, Bingnan,Jiang, Xiaoqing,Sun, Peipei
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p. 2786 - 2791
(2013/04/24)
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- Rapid synthesis and zebrafish evaluation of a phenanthridine-based small molecule library
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A Heck cyclisation approach is described for the rapid synthesis of a library of natural product-like small molecules, based on the phenanthridine core. The synthesis of a range of substituted benzylamine building blocks and their incorporation into the library is reported, together with a highly selective cis-dihydroxylation protocol that enables access to the target compounds in an efficient manner. Biological evaluation of the library using zebrafish phenotyping has led to the discovery of compound 20c, a novel inhibitor of early-stage zebrafish embryo development.
- Donaldson, Lauren R.,Wallace, Stephen,Haigh, David,Patton, E. Elizabeth,Hulme, Alison N.
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supporting information; experimental part
p. 2233 - 2239
(2011/04/27)
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- Dual Pharmacophores - PDE4-Muscarinic Antagonistics
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The present invention is directed to novel compounds of Formula (I) and pharmaceutically acceptable salts thereof, pharmaceutical compositions and their use as dual chromaphores having inhibitory activity against PDE4 and muscarinic acetylcholine receptors (mAChRs), and thus being useful for treating respiratory diseases.
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Page/Page column 45
(2009/08/18)
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- Dual Pharmacophores - PDE4-Muscarinic Antagonistics
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The present invention relates to novel compounds of Formula (I) and their use in the treatment of respiratory diseases, including anti-inflammatory and allergic diseases such as chronic obstructive pulmonary disease (COPD), asthma, rhinitis (e.g. allergic rhinitis), atopic dermatitis or psoriasis.
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Page/Page column 48
(2009/08/18)
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- Dual Pharmacophores - PDE4-Muscarinic Antagonistics
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The present invention is directed to novel compounds of Formula (I), pharmaceutical compositions and their use in therapy, for example as inhibitors of phosphodiesterase type IV (PDE4) and as antagonists of muscarinic acetylcholine receptors (mAChRs), in the treatment of/and or prophylaxis of respiratory diseases, including antiinflammatory and/or allergic diseases such as chronic obstructive pulmonary disease (COPD), asthma, rhinitis (e.g. allergic rhinitis), atopic dermatitis or psoriasis.
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Page/Page column 47-48
(2009/08/16)
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- DUAL PHARMACOPHORES - PDE4-MUSCARINIC ANTAGONISTICS
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The present invention is directed to novel compounds of Formula's (I) - (VI), and pharmaceutically acceptable salts thereof, pharmaceutical compositions and their use in therapy, for example as inhibitors of phosphodiesterase type IV (PDE4) and as antagonists of muscarinic acetylcholine receptors (mAChRs), in the treatment of and/or prophylaxis of respiratory diseases, including inflammatory and/or allergic diseases such as chronic obstructive pulmonary disease (COPD), asthma, rhinitis (e.g. allergic rhinitis), atopic dermatitis or psoriasis.
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Page/Page column 122
(2009/10/09)
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- 1,2,4-TRIAZOL-l-YL BISPHENYL DERIVATIVES FOR USE IN THE TREATMENT OF ENDOCRINE-DEPENDENT TUMOURS
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There is provided a compound of Formula I wherein R3, R4, R5, R6 and R7 are independently selected from H and -Y-R6; wherein each R8 is independently selected from -OH, hydrocarbyl groups, oxyhydrocarbyl groups, cyano (-CN), nitro (-NO2), H-bond acceptors, and halogens; wherein at Jeast one of R3, R4, R5, R6 and R7 is -Y-R8 wherein R8 is selected from substituted and unsubstituted ? heterocyclic rings and amino substituted phenyl groups, wherein X is a bond or a linker group; wherein Y is an optional linker group; and wherein ring A is optionally further , substituted; wherein R9 is selected from H, -OH and -OSO2NR1R2; wherein R1 and R2 are independently selected from H and hydrocarbyl; wherein (a) X is a bond and at least one of R3, R4, R5, R6 and R7 is -Y-R8; OR (b) R9 is -OSO2NR1R2 or - OH and four of R3, R4, R5, R6 and R7 are H and one of R3, R4, R5, R6 and R7 is -Y-R8. These compounds inhibit steroid sulphatase and aronatase activity and are useful in the treatment of endocrine-dependent tumours.
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Page/Page column 128
(2008/06/13)
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- SYNTHESIS AND POLYMERIZATION OF 2,5-DISUBSTITUTED PHENYLACETYLENES CONTAINING TRIFLUOROMETHYL GROUPS
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Four phenylacetylenes (2-R2-5-R5-C6H3CCH : 1a R2=R5=CF3; 1b R2=CF3, R5=CH3; 1c R2=CH3, R5=CF3; 1d R2=R5=CH3) were synthesized via lithio compounds or Grignard reagent.Bromo(methyl)benzotrifluorides, the precursors for the lithio compounds, were prepared by the fluorination of the corresponding benzoic acids with sulfur tetrafluoride.Polymerization using transition metal catalysts provided polyacetylenes in high yields for all the monomers, while the yields of γ-ray induced polymerization depended on the monomers.The molecular weights of polyacetylenes have a positive correlation with the yields for all the polymerizations.The substituent effects on the molecular weights and tehrmal stabilities of polymers obtained were discussed.
- Nishida, Masakazu,Hosokawa, Kenzo,Ueda, Teruo,Aoki, Toshiki,Muramatsu, Hiroshige
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- Novel Rearrangement of 1,4-Ylidic Thiaanthracenes
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A novel rearrangement of 10-alkyl-9-aryl-10-thiaanthracenes is described. 9-Mesityl-10-methyl-10-thiaanthracene (8a) generated by proton abstraction of 9-mesityl-10-methylthioxanthenium perchlorate (7a) with sodium hydride in THF underwent thermal rearran
- Ohno, Sachio,Shimizu, Hiroshi,Kataoka, Tadashi,Hori, Mikio
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p. 2472 - 2478
(2007/10/02)
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