77902-90-0Relevant articles and documents
New chiral imidazolium ionic liquids: 3D-network of hydrogen bonding
Jodry, Jonathan J.,Mikami, Koichi
, p. 4429 - 4431 (2004)
New hydrophobic chiral ionic liquids bearing an imidazolium core have been stereospecifically prepared from the chiral pool; their enantiomeric purity and 3D-network of hydrogen bonding were analysed by NMR and X-ray diffraction, respectively.
Copper-Catalyzed Substitution of α-Triflyloxy Nitriles and Esters with Silicon Nucleophiles under Inversion of the Configuration
Scharfbier, Jonas,Hazrati, Hamideh,Irran, Elisabeth,Oestreich, Martin
supporting information, p. 6562 - 6565 (2017/12/26)
A copper-catalyzed nucleophilic displacement of α-triflyloxy nitriles and esters with silicon nucleophiles allows for the stereospecific generation of highly enantioenriched α-silylated carboxyl compounds. The enantioselective synthesis of α-silylated nitriles is unprecedented. The catalytic system exhibits good functional group tolerance. The stereochemical course of the substitution is shown to proceed with inversion of the configuration. The new reaction is an addition to the still limited number of methods for catalytic C(sp3)-Si cross-coupling.
DIHYDROPTERIDINONES
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Page/Page column 76, (2013/05/23)
Compounds of Formula I, as shown below and defined herein: pharmaceutically acceptable salts thereof, synthesis, intermediates, formulations, and methods of disease treatment therewith, including treatment of cancers, such as tumors driven or mediated at
Expeditious microwave-assisted synthesis of 5-alkoxyoxazoles from α-triflyloxy esters and nitriles
Jouanno, Laurie-Anne,Sabot, Cyrille,Renard, Pierre-Yves
, p. 8549 - 8555 (2012/11/07)
A rapid and general access to diversely substituted 5-alkoxyoxazoles 2 (i.e., R1, R2 = alkyl, phenyl) from easily accessible α-triflyloxy/hydroxy esters 1 and nitriles with good yields (41-76%) is reported. The versatility of the cyc
Nucleophilic fluorination of triflates by tetrabutylammonium bifluoride
Kim, Kyu-Young,Bong, Chan Kim,Hee, Bong Lee,Shin, Hyunik
, p. 8106 - 8108 (2008/12/22)
(Chemical Equation Presented) Careful examination of nucleophilicity, basicity, and leaving group ability led us to discover the nucleophilic fluorination of triflates by weakly basic tetrabutylammonium bifluoride, which provides excellent yields with minimal formation of elimination-derived side products. Primary hydroxyl groups as well as secondary hydroxyl groups in acyclic chains or in five-membered rings are excellent substrates, whereas benzylic and aldol-type secondary hydroxyl groups give poor yields as a result of the instability of their triflates.
CONJUGATES OF 2,4-ETHANO-BRIDGED AND 2,4-PROPANO-BRIDGED 3,6,9-TRIAZA-NONANOIC ACID, 3N,6N,9,9N-TETRAETHANOIC ACID, AND CORRESPONDING PHOSPHORIC ACID METHYLENE DERIVATIVES AND THE SUBSTITUTION PRODUCTS THEREOF WITH BIOMOLECULES, METHODS FOR THE PRODUCTION THEREOF, AND THE USE OF THE SAME FOR PRODU
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Page 51; 52, (2010/02/08)
The invention relates to conjugates of 2,4-ethano-bridged and 2,4-propano-bridged 3,6,9-triaza-nonanoic acid, N,N,N-tetraethanoic acid, and corresponding phosphoric acid ester methylene derivatives of formula (1) - wherein the substituents are defined as cited in patent claim 1 - and the substitution products thereof with biomolecules. The invention also relates to methods for producing said conjugates and to the use of the same as contrasting media in NMR diagnosis and radiodiagnosis, and for radiotherapy.
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.
Synthesis of Gadolinium (+/-)-10-(1-Hydroxypropan-2-yl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyltriacetate via Tribenzyl 1,4,7,10-Tetraazacyclododecane-1,4,7-tricarboxylate
Prasad, J. Siva,Okuniewicz, Frank J.,Delaney, Edward J.
, p. 3329 - 3332 (2007/10/02)
The synthesis of monogadolinium 10-(1-hydroxypropan-2-yl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyltriacete 12 has been achieved trough a multistep sequence.The key step in the synthesis was the reaction of the previously unknown tribenzyl 1,4,7,10-tetraazacyclododecane-1,4,7-tricarboxylate 6 with ethyl 2-(trifluoromethylsulphonyloxy)propionate 4 to give 7.Reduction of 7 with LiBH4/9-OMe-BBN, followed by hydrogenolysis of the protecting groups (Z groups) yielded 2-(1,4,7,10-tetraazacyclododec-1-yl)propanol 10.The monosubstituted macrocycle 10 was alkylated withbromoacetic acid and then complexed with gadolinium oxide to yield the title compound.
Versatile β-Keto Ester and β-Keto Nitrile Synthesis through Sulfide Contraction.
Shiosaki, Kazumi,Fels, Gregor,Rapoport, Henry
, p. 3230 - 3234 (2007/10/02)
A versatile and efficient synthesis for various β-keto esters, including those which are α substituted, is described.The α-thio iminium salt prepared from a thioamide and a primary or secondary alkylating agent is subjected to sulfur extrusion upon addition of base and a phosphine thiophile, and the result is an enamino ester which may be hydrolyzed to the desired β-keto ester.The method is also applicable to the preparation of various substituted β-keto nitriles.
