76716-51-3Relevant academic research and scientific papers
Synthesis, in vitro assay, and molecular modeling of new piperidine derivatives having dual inhibitory potency against acetylcholinesterase and Aβ1-42 aggregation for Alzheimer's disease therapeutics
Kwon, Young Ee,Park, Jung Youl,No, Kyung Tai,Shin, Jae Hong,Lee, Sung Kwang,Eun, Jae Soon,Yang, Jae Heon,Shin, Tae Yong,Kim, Dae Keun,Chae, Byung Sook,Leem, Jae-Yoon,Kim, Kuk Hwan
, p. 6596 - 6607 (2008/03/27)
With the goal of developing Alzheimer's disease therapeutics, we have designed and synthesized new piperidine derivatives having dual action of acetylcholinesterase (AChE) and beta-amyloid peptide (Aβ) aggregation inhibition. For binding with the catalytic site of AChE, an ester with aromatic group was designed, and for the peripheral site, another aromatic group was considered. And for intercalating amyloid-beta oligomerization, long and linear conformation with a lipophilic group was considered. The synthetic methods employed for the structure with dual action depended on alcohols with an aromatic ring and the substituted benzoic acids, which are esterificated in the last step of the synthetic pathway. We screened these new derivatives through inhibition tests of acetylcholinesterase, butyrylcholinesterase (BChE), and Aβ1-42 peptide aggregation, AChE-induced Aβ1-42 aggregation. Our results displayed that compound 12 showed the best inhibitory potency and selectivity of AChE, and 29 showed the highest selectivity of BChE inhibition. Compounds 15 and 12 had inhibitory activities against Aβ1-42 aggregation and AChE-induced Aβ aggregation. In the docking model, we confirmed that 4-chlorobenzene of 12 plays the parallel π-π stacking against the indole ring of Trp84 in the bottom gorge of AChE. Because the benzyhydryl moiety of 12 covered the peripheral site of AChE in a funnel-like shape, 12 showed good inhibitory potency against AChE and could inhibit AChE-induced Aβ1-42 peptide aggregation.
Asymmetric michael reactions on polymeric support: Auxiliary immobilization and stereoselective construction of quaternary stereocenters
Kreidler, Burkard,Baro, Angelika,Christoffers, Jens
, p. 5339 - 5348 (2007/10/03)
Several strategies for the immobilization of a L-valine-derived auxiliary on a Merrifield resin and on poly(ethylene glycol) are reported. The latter is shown to work excellently in asymmetric copper(II)-catalyzed Michael reactions of cyclic β-oxo esters 2 with methyl vinyl ketone (4), yielding the corresponding addition products 5 with quaternary stereocenter in selectivities of 97-99 % ee. The PEG-supported auxiliary 1d can be precipitated from diethyl ether solutions and reused. A sulfur-containing β-oxo ester 2c was prepared in 92 % yield by a DMAP-catalyzed transesterification method in order to detect enamine formation on solid support. The sulfur content can be used as an additional parameter in combustion analysis and therefore, may act as a diagnostic probe for enamine formation. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.
Pyrrolopyrimidine A2b selective antagonist compounds, their synthesis and use
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Page 29, (2010/02/06)
The subject invention provides compounds having the structure: 1 wherein,R1 is a substituted or unsubstituted alkyl, wherein the substituent is hydroxyl, dihydroxy, carboxyl, —C(═O)NRaRb, —NRaRb, —NRaC(═O)NRaRb, —NRaC(═O)ORa, —OC(═O)NRaRb, or —NHC(═O)Ra;R2 is hydrogen or a substituted or unsubstituted alkyl, wherein the substituent is hydroxyl, dihydroxy, carboxyl, —C(═O)NRaRb, —NRaRb, —NRaC(═O)NRaRb, —NRaC(═O)ORa, —OC(═O)NRaRb, or —NHC(═O)Ra, orR1, R2 and N together form a substituted piperazine, substituted azetidine ring, or a pyrrolidine ring substituted with —(CH2)2OH or —CH2C(═O)OH;R3 is a substituted or unsubstituted phenyl or a 5-6 membered heteroaryl ring, wherein the substituent is halogen, hydroxyl, cyano, (C1-C15)alkyl, (C1-C15)alkoxy, or —NRaRb;R4 is hydrogen or substituted or unsubstituted (C1-C15)alkyl;R5 is —(CH2)mOR6, —CHNOR7, —C(═O)NR8R9, —(CH2)mC(═O)OR10, —(CH2)kC(═O)NR11R12;wherein R6 is a substituted or unsubstituted (C1-C30)alkyl, (C3-C10)cycloalkyl, or an aryl, heteroaryl or 4-8 membered heterocyclic ring;R7 is hydrogen, or a substituted or unsubstituted (C1-C30)alkyl, (C1-C30)alkylaryl;R8 and R9 are each independently hydrogen, or a substituted or unsubstituted (C1-C30)alkyl, (C1-C30)alkylaryl, (C1-C30)alkylamino, (C1-C30)alkoxy, or a saturated or unsaturated, monocyclic or bicyclic, carbocyclic or heterocyclic ring, orR8, N, and R9 together form a substituted or unsubstituted 4-8 membered heterocyclic ring;R10 is hydrogen or a substituted or unsubstituted (C1-C30)alkyl, (C3-C10)cycloalkyl, or an aryl, heteroaryl or heterocyclic ring;R11, N and R12 together form a 4-8 membered heterocyclic ring;Ra and Rb are each independently hydrogen or alkyl;m is 0, 1, 2 or 3; andk is 1, 2 or 3,or a specific enantiomer thereof, or a specific tautomer thereof, or a pharmaceutically acceptable salt thereof, and a method for treating a disease associated with the A2b adenosine receptor in a subject in need of such treatment comprising administering to the subject a therapeutically effective amount of the compounds of the invention.
Chemoselective deprotection of teriary benzylamines and reduction of carbon-carbon double bonds in the presence of benzyl and benzyloxymethyl ethers
Bajwa,Slade,Repic
, p. 6025 - 6028 (2007/10/03)
Catalytic transfer hydrogenation using 10% Pd-C in the presence of 1,4-cyclohexadiene as the hydrogen donor selectively debenzylates amines and reduces carbon-carbon double bonds while leaving benzyl and benzyloxymethyl ethers intact. (C) 2000 Elsevier Sc
Azetidine, pyrrolidine and piperidine derivatives
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, (2008/06/13)
A class of substituted azetidine, pyrrolidine and piperidine derivatives, linked by a fluoro-substituted alkylene chain to a fused bicyclic heteroaromatic moiety such as indolyl, are selective agonists of 5-HT1 -like receptors, being potent ago
Benzimidazole derivatives
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, (2008/06/13)
The invention is directed to substituted benzimidazole compounds which are ligands for dopamine receptor subtypes used in the treatment of the dopamine system.
A novel type of Pd/C-catalyzed hydrogenation using a catalyst poison: Chemoselective inhibition of the hydrogenolysis for O-benzyl protective group by the addition of a nitrogen-containing base
Sajiki, Hironao,Hirota, Kosaku
, p. 13981 - 13996 (2007/10/03)
A mild and chemoselective hydrogenation method for a variety of reducible functional groups distinguishing front aliphatic and aromatic' benzyl ethers was accomplished by the addition of an appropriate nitrogen- containing base to the Pd/C-catalyzed hydrogenation system.
Selective Inhibition of Benzyl Ether Hydrogenolysis with Pd/C Due to the Presence of Ammonia, Pyridine or Ammonium Acetate
Sajiki, Hironao
, p. 3465 - 3468 (2007/10/02)
Ammonia, pyridine and ammonium acetate were found to be extremely effective as inhibitors of Pd/C catalyzed benzyl ether hydrogenolysis.While olefin, Cbz, benzyl ester and azide functionalities were hydrogenated smoothly, benzyl ethers were not cleaved in the presence of these additives.
