Synthesis and Structure−Activity Relationship of a New Series of COX-2 Selective Inhibitors: 1,5-Diarylimidazoles
作者:Carmen Almansa、José Alfón、Alberto F. de Arriba、Fernando L. Cavalcanti、Ignasi Escamilla、Luis A. Gómez、Agustí Miralles、Robert Soliva、Javier Bartrolí、Elena Carceller、Manuel Merlos、Julián García-Rafanell
DOI:10.1021/jm030765s
日期:2003.7.1
The synthesis and the pharmacological activity of a series of 1,5-diarylimidazoles developed as potent and selective cyclooxygenase-2 (COX-2) inhibitors are described. The new compounds were evaluated both in vitro (COX-1 and COX-2 inhibition in human whole blood) and in vivo (carrageenan-induced paw edema, air-pouch, and hyperalgesia tests). Modification of all the positions of two regioisomeric imidazole
The base-free van Leusen reaction of cyclic imines on water: synthesis of <i>N</i>-fused imidazo 6,11-dihydro β-carboline derivatives
作者:Killari Satyam、V. Murugesh、Surisetti Suresh
DOI:10.1039/c9ob00660e
日期:——
imidazoles has been demonstrated on water under base-free conditions. The reaction of dihydro β-carboline imines and p-toluenesulfonylmethyl isocyanides furnished the corresponding substituted N-fused imidazo 6,11-dihydro β-carboline derivatives in very good yields under ambient conditions. The use of deuteriumoxide (D2O) as a solvent enabled the incorporation of deuterium isotopes in the imidazole ring
A Mitsunobu approach for the synthesis of sulfinate esters by direct nucleophilic substitution of alcohols is described. The salient features of this strategy include neutral and metal‐free conditions for the rapid synthesis of sulfinates in high yields. The present protocol using p‐toluenesulfonylmethyl isocyanide (TosMIC) and the triphenylphosphine (TPP)/diisopropyl azodicarboxylate (DIAD) reagent
A bismuth(III) bromide‐catalysed direct substitution of benzylalcohols with arylsulfonylmethylisocyanides affords sulfinates under mild acidic conditions. An unforeseen reversed reactivity was observed in this highly selective formation of sulfinates instead of the formation of the usually favoured sulfones. Cytotoxicity tests (in vitro) indicated that the sulfinates exhibit antibiotic activity against
new method for the synthesis of di‐ and trisubstituted pyrroles via copper‐catalyzed cyclization of ethyl allenoates with activated isocyanides has been developed. In contrast to related annulation reactions previously reported, this new process features a skeletal rearrangement in which the aryl sulfonyl moiety, which functions as the electron‐withdrawing group in the α‐carbon of the isocyanide, was