201851-06-1Relevant articles and documents
COMPOUNDS AND METHODS FOR THE TREATMENT OF CYSTIC FIBROSIS
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Page/Page column 217-218, (2020/08/22)
The invention relates to a compound of Formula I, pharmaceutical compositions comprising a compound of Formula I, and pharmaceutically acceptable slats thereof, pharmaceutical compositions comprising such compounds and methods of treating cystic fibrosis comprising the step of administering a therapeutically effective amount of a compound of Formula I to a subject in need thereof.
Transition-Metal-Free C-C, C-O, and C-N Cross-Couplings Enabled by Light
Liu, Wenbo,Li, Jianbin,Querard, Pierre,Li, Chao-Jun
supporting information, p. 6755 - 6764 (2019/05/06)
Transition-metal-catalyzed cross-couplings to construct C-C, C-O, and C-N bonds have revolutionized chemical science. Despite great achievements, these metal catalysts also raise certain issues including their high cost, requirement of specialized ligands, sensitivity to air and moisture, and so-called "transition-metal-residue issue". Complementary strategy, which does not rely on the well-established oxidative addition, transmetalation, and reductive elimination mechanistic paradigm, would potentially eliminate all of these metal-related issues. Herein, we show that aryl triflates can be coupled with potassium aryl trifluoroborates, aliphatic alcohols, and nitriles without the assistance of metal catalysts empowered by photoenergy. Control experiments reveal that among all common aryl electrophiles only aryl triflates are competent in these couplings whereas aryl iodides and bromides cannot serve as the coupling partners. DFT calculation reveals that once converted to the aryl radical cation, aryl triflate would be more favorable to ipso substitution. Fluorescence spectroscopy and cyclic voltammetry investigations suggest that the interaction between excited acetone and aryl triflate is essential to these couplings. The results in this report are anticipated to provide new opportunities to perform cross-couplings.
Organic metal compounds and organic light emitting diodes comprising the same
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Paragraph 0488-0489; 0492-0494, (2018/12/01)
PURPOSE: An organic metal compound is provided to have excellent thermal properties and light emitting efficiency, thereby being useful for a display and lighting device. CONSTITUTION: An organic metal compound is represented by chemical formula 1. In chemical formula 1, each of R and Z is hydrogen, deuterium, cyano, halogen hydroxy, nitro, C1-40 alkyl, C1-40 alkoxy, C1-40 alkylamino, C6-40 arylamino, C3-40 heteroarylamino, C1-40 alkoxy group, C1-40 alkylamino, C6-40 aryl group, C3-40 aryloxy group, germanium, phosphorous, and boron; each of A, B, C, D, and E is a substituted or unsubstituted aromatic cycle, or substituted or unsubstituted hydrocycle, X is carbon or nitrogen, G is chemical bond or C1-4 alkylene which can be substituted by (R-Zi)n.
Covalently Interlocked Cyclohexa-m-phenylenes and Their Assembly: En Route to Supramolecular 3D Carbon Nanostructures
Dumslaff, Bastian,Reuss, Anna N.,Wagner, Manfred,Feng, Xinliang,Narita, Akimitsu,Fytas, George,Müllen, Klaus
supporting information, p. 10602 - 10606 (2017/08/22)
In our search to cluster as many phenylene units as possible in a given space, we have proceeded to the three-dimensional world of benzene-based molecules by employing covalently interlocked cyclohexa-m-phenylenes, as present in the unique paddlewheel-sha
Selective arylation and vinylation at the α position of vinylarenes
Zou, Yinjun,Qin, Liena,Ren, Xinfeng,Lu, Yunpeng,Li, Yongxin,Zhou, Jianrong
supporting information, p. 3504 - 3511 (2013/07/05)
In intermolecular Heck reactions of styrene and vinylarenes, the aryl and vinyl groups routinely insert at the β position. However, selective insertion at the α position has been very rare. Herein, we provide a missing piece in the palette of Heck reaction, which gave >20:1 α selectivity. The key to our success is a new ferrocene 1,1′-bisphosphane (dnpf) that carries 1-naphthyl groups. Our mechanistic studies revealed that the high α selectivity is partly attributable to the steric effect of dnpf. The rigid and bulky 1-naphthyl groups of dnpf sterically disfavor β insertion. What the Heck! In intermolecular Heck reactions, insertion at the β position of aromatic olefins is very common, but reversal of the selectivity for selective α insertion has been a longstanding problem. A general method to couple aryl and vinyl triflates with aromatic olefins in >20:1 α selectivity is presented. The key to this successful approach is a new ferrocene bisphosphane with naphthyl groups on the phosphorus atom (see scheme; OTf=triflate). Copyright
Achieving vinylic selectivity in Mizoroki-heck reaction of cyclic olefins
Wu, Xiaojin,Lu, Yunpeng,Hirao, Hajime,Zhou, Jianrong
supporting information, p. 6014 - 6020 (2013/06/26)
In Heck reactions of cyclic olefins, the products usually have aryl groups that end up at the allylic and/or homoallylic position. We herein report new selectivity that adds aryl groups to the vinylic position. Cyclic olefins of various ring size worked well. The desired isomers were produced by palladium-hydride-catalyzed isomerization of the initial products. Thus, a specific catalyst must be used so that it can perform two jobs under one set of reaction conditions. Copyright
Intermolecular mizoroki-heck reaction of aliphatic olefins with high selectivity for substitution at the internal position
Qin, Liena,Ren, Xinfeng,Lu, Yunpeng,Li, Yongxin,Zhou, Jianrong
supporting information; experimental part, p. 5915 - 5919 (2012/07/30)
New ligand for old reaction: The title reaction of aryltriflates with aliphatic olefins leads to substitution at the internal position with high selectivity. The ratio of the desired isomer (shown in the scheme) to the sum of all other isomers is generall
Highly potent macrocyclic BACE-1 inhibitors incorporating a hydroxyethylamine core: Design, synthesis and X-ray crystal structures of enzyme inhibitor complexes
Sandgren, Veronica,Agback, Tatiana,Johansson, Per-Ola,Lindberg, Jimmy,Kvarnstr?m, Ingemar,Samuelsson, Bertil,Belda, Oscar,Dahlgren, Anders
supporting information; scheme or table, p. 4377 - 4389 (2012/08/28)
A series of P1-P3 linked macrocyclic BACE-1 inhibitors containing a hydroxyethylamine (HEA) isostere scaffold has been synthesized. All inhibitors comprise a toluene or N-phenylmethanesulfonamide P2 moiety. Excellent BACE-1 potencies, both in enzymatic an
Chemical synthesis and evaluation of 17α-alkylated derivatives of estradiol as inhibitors of steroid sulfatase
Fournier, Diane,Poirier, Donald
experimental part, p. 4227 - 4237 (2011/11/12)
Steroid sulfatase (STS) controls the levels of 3-hydroxysteroids available from circulating steroid sulfates in several normal and malignant tissues. This and the known involvement of active estrogens and androgens in diseases such as breast and prostate cancers thus make STS an interesting therapeutic target. Here we describe the chemical synthesis and characterization of an extended series of 17α-derivatives of estradiol (E2) using different strategies. A variant of the samarium-Barbier reaction with stoichiometric samarium metal and catalytic Kagan reagent formation was used for introducing low reactive benzyl substrates in position 17 of estrone (E1) whereas heterocyclic substrates were metalated and reacted with either the carbonyl or the 17-oxirane of E1. In vitro evaluation of the inhibitory potency of the new compounds against STS identified new inhibitors and allowed a more complete structure-activity relationship study of this family of 17α-derivatives of E2.
(3-HYDROXY-4-AMINO-BUTAN-2-YL) -3- (2-THIAZOL-2-YL-PYRROLIDINE-1-CARBONYL) BENZAMIDE DERIVATIVES AND RELATED COMPOUNDS AS BETA-SECRETASE INHIBITORS FOR TREATING
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Page/Page column 91, (2009/05/29)
The present invention provides novel beta-secretase inhibitors and methods for their use, including methods of treating of Alzheimer's disease. (Formula)
