137420-52-1Relevant academic research and scientific papers
[2,3]-Sigmatropic rearrangements of didehydropiperidinium ylids
Sweeney,Tavassoli, Ali,Carter, Neil B.,Hayes, Jerome F.
, p. 10113 - 10126 (2002)
The [2,3]-sigmatropic rearrangements of ammonium ylids derived from 1,2,5,6-tetrahydropyridine have been studied: both rearrangement and elimination processes are observed, with rearrangement favoured when aprotic solvents are used in the reaction. The presence of anion-stabilizing substituents on the nucleophilic carbon atom of the intermediate ylid species involved in the tranformation also engenders rearrangement; when certain aryl substituents or two anion-stabilizing groups are present, elimination is not observed, and electron-donating ylid substituents retard rearrangement whilst enhancing elimination.
Pyrrolidine integrin regulator and application thereof
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Paragraph 077-0711, (2021/09/08)
Disclosed are a compound as represented by formula I, and a racemate, a stereoisomer, a tautomer, an isotopic marker, a nitrogen oxide, a solvate, a polymorph, a metabolite, an ester, and a prodrug thereof or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising same, a preparation method therefor, and the medical use thereof. The structure of formula I is as follows:
New 4-aryl-1,3,2-oxathiazolylium-5-olates: Chemical synthesis and photochemical stability of a novel series of S-nitrosothiols
Eilertsen, Monica,Allin, Steve M.,Pearson, Russell J.
supporting information, p. 1106 - 1110 (2018/02/28)
S-nitrosothiols (RSNOs) remain one of the most popular classes of NO-donating compounds due to their ability to release nitric oxide (NO) under non-enzymatic means whilst producing an inert disulphide by-product. However, alligning these compounds to the different biological fields of NO research has proved to be problematic due to the inherent instability of such compounds under a variety of conditions including heat, light and the presence of copper ions. 1,3,2-Oxathiazolylium-5-olates (OZOs) represent an interesting subclass of S-nitrosothiols that lock the –SNO moiety into a five membered heterocyclic ring in an attempt to improve the compound's overall stability. The synthesis of a novel series of halogen-containing OZOs was comprehensively studied resulting in a seven-step route and overall yields ranging between 21 and 37%. The photochemical stability of these compounds was assessed to determine if S-nitrosothiols locked within these mesoionic ring systems can offer greater stability and thereby release NO in a more controllable fashion than their non-cyclic counterparts.
Synthesis of Quinolines by Visible-Light Induced Radical Reaction of Vinyl Azides and α-Carbonyl Benzyl Bromides
Wang, Qile,Huang, Jun,Zhou, Lei
, p. 2479 - 2484 (2015/08/18)
A visible-light induced radical reaction of vinyl azides and α-carbonyl benzyl bromides was developed, which provides an efficient route to polysubstituted quinolines via a C-C and C-N bond formation sequence.
NOVEL OXADIAZOLE DERIVATIVES AS SPHINGOSINE 1-PHOSPHATE (S1P) RECEPTOR MODULATORS
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Page/Page column 25; 26, (2012/06/16)
The present invention relates to novel oxadiazole derivatives, processes for preparing them, pharmaceutical compositions containing them and their use as pharmaceuticals as modulators of sphingosine-1 -phosphate receptors.
PROCESS FOR PRODUCTION OF THIOPHENE COMPOUND AND INTERMEDIATE THEREOF
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Page/Page column 12, (2010/11/17)
To provide a novel process for producing a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound or an intermediate thereof useful as an intermediate for production of medicines and agricultural chemicals. A 2-aryl acetate compound represented by the formula (1): wherein R1 is an aryl group or the like, R4 is a C1-3 alkyl group or the like, and X is a leaving group, is reacted with a thioacetic acid compound to form a thioacetyl compound (3), the thioacetyl compound (3) is reacted with a vinyl ketone compound to form a γ-ketosulfide compound (5), which is cyclized under basic conditions to form a dihydrothiophene compound (6), and the dihydrothiophene compound (6) is oxidized by using an oxidizing agent to produce a 2-aryl-3-hydroxy-4-substituted carbonyl thiophene compound (7).
Thiazolo-pyrimidine/pyridine urea derivatives
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Page/Page column 48-49, (2008/06/13)
There are presented compounds of the formula or a pharmaceutically acceptable salt thereof, which are active adenosine A2B receptor antagonists and useful in the treatment of diabetes, diabetic retinopathy, asthma and diarrhea.
Selective ET(A) antagonists. 5. Discovery and structure-activity relationships of phenoxyphenylacetic acid derivatives
Astles, Peter C.,Brown, Thomas J.,Halley, Frank,Handscombe, Caroline M.,Harris, Neil V.,Majid, Tahir N.,McCarthy, Clive,McLay, Lain M.,Morley, Andrew,Porter, Barry,Roach, Alan G.,Sargent, Carol,Smith, Christopher,Walsh, Roger J. A.
, p. 900 - 910 (2007/10/03)
The fifth paper in this series describes the culmination of our investigations into the development of a potent and selective ETA receptor antagonist for the treatment of diseases mediated by ET-1. Receptor site mapping of several ETA antagonists prepared previously identified a common cationic binding site which prompted synthesis of phenoxyphenylacetic acid derivative 13a, which showed good in vitro activity (IC50 59 nM, rat aortic ET(A)). Optimization of 13a led to the identification of 27b, which exhibited an IC50 of 4 nM. Although this did not translate into the expected in vivo potency, a compound of comparable in vitro activity, 27a (RPR118031A), showed a far better pharmacokinetic profile and in vivo potency (75 μmol/kg) and was duly proposed and accepted as a development candidate.
SUBSTITUTED PHENYL COMPOUNDS WITH A SUBSTITUENT HAVING A 1,3-BENZODIOXOLE RING
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, (2008/06/13)
This invention is directed to compounds of formula I STR1 wherein R 1 is CN, CH 2 CN, CH=CHCN, CHO, or CH=CHCO. sub. 2 H;R 2 is aryl lower alkoxy, heteroaryl lower alkoxy, aryl lower alkylthio or heteroaryl lower alkylthio wherein each of the aryl and heteroaryl moieties is optionally substituted;R 3 is halogen;R 4 is optionally substituted aryl or optionally substituted heteroaryl;R. sup.5 is carboxy or an acid isostere; X is oxygen or sulphur; and n is zero or 1; or an N-oxide thereof, prodrug thereof solvate thereof, or pharmaceutically acceptable salt thereof, which compounds have endothelin antagonist activity. The invention is also directed to methods for preparing the compounds of formula I and their pharmaceutical use.
Substituted phenyl compounds with a substituent having a thienyl ring
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, (2008/06/13)
This invention is directed to compounds of formula I wherein R1 is CN, CH2CN, CH=CHCN, CHO, or CH=CHCO2H; R2 is aryl lower alkoxy, heteroaryl lower alkoxy, aryl lower alkylthio or heteroaryl lower alkylthio wherein each of the aryl and heteroaryl moieties is optionally substituted; R3 is halogen; R4 is optionally substituted aryl or optionally substituted heteroaryl; R5 is carboxy or an acid isostere; X is oxygen or sulphur; and n is zero or 1; or an N-oxide thereof, prodrug thereof solvate thereof, or pharmaceutically acceptable salt thereof, which compounds have endothelin antagonist activity. The invention is also directed to methods for preparing the compounds of formula I and their pharmaceutical use.
