88016-30-2Relevant academic research and scientific papers
Regioselectivity of thiouracil alkylation: Application to optimization of Darapladib synthesis
Guibbal, Florian,Bénard, Sébastien,Patché, Jessica,Meneyrol, Vincent,Couprie, Jo?l,Yong-Sang, Jennyfer,Meilhac, Olivier,Jestin, Emmanuelle
supporting information, p. 787 - 792 (2018/01/17)
Darapladib is one of the most potent Lp-PLA2 (Lipoprotein-associated phospholipase A2) inhibitor with an IC50 of 0.25 nM. We demonstrate that a crucial step of Darapladib synthesis was not correctly described in the litera
Dehydration-type Ti-Claisen Condensation (Carbonhomologation) of α-Heteroatom-substituted Acetates with Alkyl Formates: Utilization as (Z)-Stereodefined Cross-coupling Partners and Application to Concise Synthesis of Strobilurin A
Nakatsuji, Hidefumi,Kamada, Risa,Kitaguchi, Hideya,Tanabe, Yoo
, p. 3865 - 3879 (2017/11/15)
TiCl4?Et3N or ?Bu3N reagent conducted a highly (Z)-stereoselective carbon homologation (dehydration type Ti-Claisen condensation) of alkyl α-heteroatom (halo and sulfonyloxy)-substituted acetates (XCH2CO2R) with alkyl formates (HCO2R) to afford various alkyl β-alkoxy-α-halo or sulfonyloxy-substituted acrylates (24 examples; 51%–91% yield). Stereoretentive Suzuki-Miyaura, Negishi, and Sonogashira cross-couplings using the obtained methyl β-methoxy-α-halo or sulfonyloxy-substituted acrylates proceeded smoothly to produce a variety of β-alkoxy-α-substituted acrylates in moderate to high yield (35 examples; 29%–99% yield). As a successful application, a 3-step straightforward synthesis of strobilurin A was performed utilizing the present reaction sequence (dehydration type Ti-Claisen condensation and Suzuki-Miyaura cross-coupling), wherein the geometry of the three consecutive olefins (2E,3Z,5E) was completely maintained. (Figure presented.).
N-ACYLHYDRAZONE DERIVATIVES FOR SELECTIVE T CELL INHIBITOR AND ANTI-LYMPHOID MALIGNANCY DRUG
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Page/Page column 17, (2014/03/25)
The present invention relates to novel N-acylhydrazone derivatives, and more particularly to novel N-acylhydrazone derivatives having selective T cell inhibitory activity and/or anti-lymphoid malignancy activity, stereoisomers thereof, pharmaceutically acceptable salts thereof, the use thereof for preparing pharmaceutical compositions, pharmaceutical compositions containing the same, treatment methods using the compositions, and methods for preparing the novel N-acylhydrazone derivatives.
Functionalization of carboxylic anhydrides at α-carbon with hypervalent iodine reagents: One-pot conversion of anhydrides to 2-sulfonyloxycarboxylate esters
Goff, Jeffrey M.,Justik, Michael W.,Koser, Gerald F.
, p. 5597 - 5599 (2007/10/03)
The treatment of carboxylic anhydrides with iodine(III) sulfonate reagents at ca. 100°C and esterification of the reaction mixtures with MeOH/TsOH·H2O affords 2-sulfonyloxycarboxylate esters. This is consistent with enolic behavior in the anhyd
