62-50-0Relevant articles and documents
Additive, electrolyte for rechargeable lithium battery, and rechargeable lithium battery
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Paragraph 0131-0135, (2021/01/29)
An additive, an electrolyte for a rechargeable lithium battery, and a rechargeable lithium battery, the additive being represented by Chemical Formula 1.
Proteasome inhibition by new dual warhead containing peptido vinyl sulfonyl fluorides
Brouwer, Arwin J.,Herrero álvarez, Natalia,Ciaffoni, Adriano,van de Langemheen, Helmus,Liskamp, Rob M.J.
, p. 3429 - 3435 (2016/07/21)
The success of inhibition of the proteasome by formation of covalent bonds is a major victory over the long held-view that this would lead to binding the wrong targets and undoubtedly lead to toxicity. Great challenges are now found in uncovering ensembles of new moieties capable of forming long lasting ties. We have introduced peptido sulfonyl fluorides for this purpose. Tuning the reactivity of this electrophilic trap may be crucial for modulating the biological action. Here we describe incorporation of a vinyl moiety into a peptido sulfonyl fluoride backbone, which should lead to a combined attack of the proteasome active site threonine on the double bond and the sulfonyl fluoride. Although this led to strong proteasome inhibitors, in vitro studies did not unambiguously demonstrate the formation of the proposed seven-membered ring structure. Possibly, formation of a seven-membered covalent adduct with the proteosomal active site threonine can only be achieved within the context of the enzyme. Nevertheless, this dual warhead concept may provide exclusive possibilities for duration and selectivity of proteasome inhibition.
Exploiting 1,2,3-Triazolium Ionic Liquids for Synthesis of Tryptanthrin and Chemoselective Extraction of Copper(II) Ions and Histidine-Containing Peptides
Li, Hsin-Yi,Chen, Chien-Yuan,Cheng, Hui-Ting,Chu, Yen-Ho
, (2016/11/02)
Based on a common structural core of 4,5,6,7-Tetrahydro[1,2,3]triazolo[1,5-A]pyridine, a number of bicyclic triazolium ionic liquids 1-3 were designed and successfully prepared. In our hands, this optimized synthesis of ionic liquids 1 and 2 requires no chromatographic separation. Also in this work, ionic liquids 1, 2 were shown to be efficient ionic solvents for fast synthesis of tryptanthrin natural product. Furthermore, a new affinity ionic liquid 3 was tailor-synthesized and displayed its effectiveness in chemoselective extraction of both Cu(II) ions and, for the first time, histidine-containing peptides.
SNAAP sulfonimidate alkylating agent for acids, alcohols, and phenols 1
Maricich, Tom J.,Allan, Matthew J.,Kislin, Brett S.,Chen, Andrea I-T.,Meng, Fan-Chun,Bradford, Christine,Kuan, Nai-Chia,Wood, Jeremy,Aisagbonhi, Omonigho,Poste, Alethea,Wride, Dustin,Kim, Sylvia,Santos, Therese,Fimbres, Michael,Choi, Dianne,Elia, Haydi,Kaladjian, Joseph,Abou-Zahr, Ali,Mejia, Arturo
, p. 3361 - 3368 (2014/01/06)
Stable, crystalline ethyl N-tert-butyl-4-nitrobenzenesulfonimidate has been prepared in high yield by direct O-ethylation of N-tert-butyl-4- nitrobenzenesulfonamide with iodoethane and silver(I) oxide in dichloromethane. This sulfonimidate directly ethylates various acids to esters; the stronger the acid, the faster it alkylates and in higher yield. It readily ethylates alcohols and phenols to ethers at room temperature in the presence of tetrafluoroboric acid catalyst without molecular rearrangements or racemization. We have defined these reactions as SNAAP alkylations: [substitution, nucleophilic of acids, alcohols and phenols]. The hard sulfonimidate alkylating agent is chemoselective, preferring oxygen > nitrogen > sulfur. The sulfonamide byproduct of alkylation is readily recycled to the sulfonimidate. Georg Thieme Verlag Stuttgart . New York.
Physicochemical characterization of new sulfonate and sulfate ammonium ionic liquids
Mahrova, Maria,Vilas, Miguel,Dominguez, Angeles,Gomez, Elena,Calvar, Noelia,Tojo, Emilia
scheme or table, p. 241 - 248 (2012/05/20)
In this work we describe the synthesis and thermal properties of nine new salts derived from ammonium that incorporate alkanesulfonate and alkanesulfate anions. Their structures were confirmed by 1H and 13C NMR and HRMS-ESI. Their thermal properties were determined by differential scanning calorimetry (DSC). Three of the synthesized salts have been shown to be room temperature ionic liquids: N-ethyl-N-(2-hydroxyethyl)-N,N-dimethylammonium butanesulfonate, N-ethyl-N,N-dimethylbutylammonium ethylsulfate, and N-ethyl-N-(2-hydroxyethyl)-N,N-dimethylammonium ethylsulfate. Experimental densities, speeds of sound, dynamic viscosities, and refractive indices of these three ionic liquids were measured at T = 298.15 K.
HETEROCYCLIC NON-PEPTIDE GNRH ANTAGONISTS
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Page/Page column 72, (2008/06/13)
A compound of formula (I): wherein either B is absent and A and Z are the same or different and are each hydrogen, halogen, alkyl, hydroxy, alkoxy,-CN,-C(Rc)2OH,-N(Rd)C(=X)Rc,-C(=X)N(Rc)(Rd),-S(O)m-Rc,-N(Rc)(Rd)S(O)2,-S(O)2N(R c)(Rd),-N(Re)2, aryl optionally substituted with Ra or-O-aryl optionally substituted with Ra; or B is present and is-(CH2)n-,-C(Rb)2-or-O-, or B taken together with A or Z can be-C=C(Rb)-,-C(Rb)=C-,-CH2-CH(R b)-or-CH(Rb)-CH2-; D is-O-or-S(O) m,-; E is a bond or is-(CH2)n-,-N(R d)-,-(CH2)nN(Rd)-or-N(R d)(CH2)n-; F is-C(=X)-; G is-(CH2 )n-,-N(Rd)-,-(CH2)nN(R d)-or-N(Rd)(CH2)n; J is a bond,-O-,-N(RC)C(=X)-,-C(=X)N(Rc)-,-S(O)m,-,-N(Rc)S(O)m-,-S(O)nN(Rc)-,-N(Re)-or-N(Rg)(Rh); K is a bond, alkylene, cycloalkylene, cycloalkenylene, arylene, heterocycloalkylene, heterocycloalkylene or heteroarylene; and L is hydrogen or a terminal group; has therapeutic utility.
PROCESS FOR PRODUCING 3-AMINO-2-HYDROXYPROPIONIC ACID DERIVATIVES
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, (2008/06/13)
The present invention provides a process for preparing 3-amino-2-hydroxypropionic acid derivatives (1) which does not use dangerous reagents, is economically advantageous, and is suitable for an industrial production, which process comprises:treating N-protected-3-amino-2-hydroxypropionic acid derivatives (2) having a steric configuration at 2-position carbon reverse to that of derivatives (1) with a leaving group-introducing agent to convert into N-protected-3-aminopropionic acid derivatives (3),then treating the derivatives with a basic substance to convert into substituted-3-amino-2-hydroxypropionic acid derivatives (4) having an inverted steric configuration at 2-position carbon,and then converting the derivatives into 3-amino-2-hydroxypropionic acid derivatives (1).
Process for preparation of oxyglutaric acid ester derivatives
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, (2008/06/13)
A process for preparing an oxyglutaric acid ester derivative of the formula: STR1 in which each of R1 and R2 is C1-5 alkoxy, C1-7 aralkyloxy, C7-9 halogenated aralkyloxy or phenyl, R4 is a hydroxyl-protecting group, and R5 is C1-10 alkyl which may have a substituent, comprises the steps of reacting a methyl phosphonate derivative or methyl phosphine oxide derivative with an oxyglutaric acid mono-ester to give a reaction product which comprises an oxyglutaric acid derivative having a phosphorus-containing group and a pentenedioic acid mono-ester (by-product), removing the pendenedioic acid mono-ester from the reaction product to isolate the oxyglutaric acid derivative, and converting the isolated oxyglutaric acid derivative into the oxyglutaric acid ester derivative. A process for obtaining an optically active oxyglutaric acid ester derivative is also disclosed.
Scavenger assisted combinatorial process for preparing libraries of tertiary amine compounds
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, (2008/06/13)
This invention relates to a novel solution phase process for the preparation of tertiary amine combinatorial libraries. These libraries have utility for drug discovery and are used to form wellplate components of novel assay kits.
Facile esterification of sulfonic acids and carboxylic acids with triethylorthoacetate
Trujillo, John I.,Gopalan, Aravamudan S.
, p. 7355 - 7358 (2007/10/02)
Triethylorthoacetate was found to be surprisingly more effective than triethylorthoformate in the esterification of sulfonic acids and carboxylic acids. Using this reagent, esters of sulfonic and carboxylic acids are prepared in high yields.
