在DMF中K 2 CO 3存在下,4-溴-NH -1,2,3-三唑2与烷基卤的反应在区域选择性中产生了相应的2-取代的4-溴-1,2,3-三唑5过程。这些溴化物的随后的Suzuki交叉偶联反应提供了2,4,5-三取代的三唑3的有效合成。另外,通过氢化还原溴代三唑提供了2,4-二取代的三唑8的有效合成。
We herein report an iodine-mediated formal [2 + 2 + 1] cyclization of methylketones, p-toluenesulfonyl hydrazines, and 1-aminopyridinium iodide for preparation of 4-aryl-NH-1,2,3-triazoles under metal- and azide-free conditions. Notably, this is achieved using p-toluenesulfonyl hydrazines and 1-aminopyridinium iodide as azide surrogates, providing a novel route toNH-1,2,3-triazoles. Furthermore, this
involving [3+2] cycloaddition, 1,2-acyl migration and hydrolysis produces 2H-1,2,3-triazoles via the regioselective formation of N2-carboxyalkylated triazoles. The reaction proceeds in aqueousmedia through intriguing reaction kinetics using a CuI–prolinamide catalyst system. Prolinamide promotes the novel organocatalytic 1,2-acyl migration as well as hydrolysis of the resulting N2-carboxyalkylated triazoles
Hydrogen‐bond mediated coupling of 1,2,3‐triazoles to indoles and pyrroles results in N2 selective functionalization of the triazole moiety in moderate to excellent yields. The reaction was tolerant of un‐, mono‐ and disubstituted triazoles and was applied to synthesize tryptophan derived fluorescent amino acids.
[EN] SELECTIN OR GALECTIN ANTAGONISTS FOR TREATING CYTOKINE RELEASE SYNDROME AND CRS-INDUCED NEUROTOXICITY<br/>[FR] ANTAGONISTES DE LA SÉLECTINE OU DE LA GALECTINE POUR LE TRAITEMENT DU SYNDROME DE LIBÉRATION DE LA CYTOKINE ET DE LA NEUROTOXICITÉ INDUITE PAR LE CRS
申请人:MAGNANI JOHN L
公开号:WO2020150263A1
公开(公告)日:2020-07-23
Methods and compounds for the treatment and/or prevention of CRS and/or CRS-induced neurotoxicities using at least one selectin antagonist are disclosed. The disclosed methods and compounds use at least one of the disclosed antagonists to target and reduce cytokine expression and/or endothelial activation to treat and/or prevent CRS and/or CRS-related conditions such as CRS-induced neurotoxicities.
[EN] HETEROBIFUNCTIONAL PAN-SELECTIN ANTAGONISTS HAVING A TRIAZOLE LINKER<br/>[FR] ANTAGONISTES HÉTÉROBIFONCTIONNELS DE PAN-SÉLECTINE PRÉSENTANT UN LIEUR DE TYPE TRIAZOLE
申请人:GLYCOMIMETICS INC
公开号:WO2017095904A1
公开(公告)日:2017-06-08
Compounds, compositions, and methods for modulating in vitro and in vivo processes mediated by selectin binding. For example, heterobifunctional compounds that inhibit both E-selectins and P-selectins are described, wherein the selectin modulators that modulate (e.g., inhibit or enhance) a selectin-mediated function comprise particular glycomimetics linked to a member of a class of compounds termed BASAs (Benzyl Amino Sulfonic Acids). The compounds are of formula (la) wherein the substituents are as defined in the claims.