Novel, potent, selective and cellular active ABC type PTP1B inhibitors containing (methanesulfonyl-phenyl-amino)-acetic acid methyl ester phosphotyrosine mimetic
摘要:
Protein tyrosine phosphatase 1B (PTP1B) which plays an important role in the negative regulation of insulin and leptin pathway has emerged as a novel promising therapeutic target for the treatment of type 2 diabetes mellitus and obesity. Upon careful study, a series of novel scaffold and simple synthesis method inhibitors were discovered based on the analysis of X-ray crystal structures of PTP1B/inhibitor complexes and docking simulations. Among them, compound P7 exhibited high inhibitory activity (IC50 = 222 nM) with moderate selectivity (8-fold) over T-cell PTPase (TCPTP) through interacting with the A, B and C binding sites of PTP1B enzyme. Further studies on cellular activities revealed that compound P7 could enhance insulin-mediated in phosphorylation and insulin-stimulated glucose uptake. (C) 2015 Elsevier Ltd. All rights reserved.
<i>meta</i>-C−H Arylation and Alkylation of Benzylsulfonamide Enabled by a Palladium(II)/Isoquinoline Catalyst
作者:Guolin Cheng、Peng Wang、Jin-Quan Yu
DOI:10.1002/anie.201704411
日期:2017.7.3
Palladium(II)‐catalyzed meta‐C−Harylation and alkylation of benzylsulfonamide using 2‐carbomethoxynorbornene (NBE‐CO2Me) as a transient mediator are realized by using a newly developed electron‐deficient directing group and isoquinoline as a ligand. This protocol features broad substrate scope and excellent functional‐group tolerance. The meta‐substituted benyzlsulfonamides can be readily transformed
Access to a Wide Range of Sultams by Cyclodialkylation of α-Substituted Methanesulfonanilides
作者:Valentin A. Rassadin、Daria S. Grosheva、Irina A. Arefeva、Aleksandr A. Tomashevskiy、Victor V. Sokolov、Armin de Meijere
DOI:10.1002/ejoc.201200670
日期:2012.9
3-diaryl-2-thia-3-azabicyclo[3.1.0]hexane 2,2-dioxides in good to excellent yields (51–88 %, 16 examples). The 4-methoxyphenyl (PMP) group was easily removed from the sultam nitrogen atom by treatment of the corresponding bicyclicsultams with cerium(IV) ammonium nitrate in acetonitrile (71–84 % yield, 6 examples).
AN EFFICIENT SYNTHESIS OF 3,4-DIHYDRO-1H-2,3-BENZOTHIAZINE 2,2-DIOXIDES USING AMBERLYST 15 AND AMBERLYST XN 1010
作者:Rodolfo D. Bravo、Alicia S. Cánepa
DOI:10.1081/scc-120014987
日期:2002.1
ABSTRACT Resins Amberlyst 15 and Amberlyst XN 1010 are used in the synthesis of 3,4-dihydro-1H-2,3-benzothiazines 2,2-dioxide. Advantages of this new procedure are simple work-up, high yield and selectivity, easy recovery of the catalyst and no waste problems.
Palladium-Catalyzed Intermolecular Coupling of Aryl Chlorides and Sulfonamides under Microwave Irradiation
作者:George Burton、Ping Cao、Gang Li、Ralph Rivero
DOI:10.1021/ol035655u
日期:2003.11.1
An efficient intermolecular N-arylation of sulfonamides with aryl chlorides is realized using palladium catalysis. The reaction proceeds under microwave irradiation at 180-200 degreesC for 10 min with 2-10 mol % of Pd catalyst in 32-85% isolated yields.
Heteropolyacid as an Efficient Catalyst for Synthesis of 3,4-Dihydro-1H-2,3-benzothiazine-2,2-dioxides
作者:Alicia S. Cánepa、Leandro D. Sasiambarrena、Rodolfo D. Bravo
DOI:10.1080/00397910802219585
日期:2008.7.24
A facile and efficient method for the formation of 3,4-dihydro-1H-2,3-benzothiazine 2,2-dioxides 2, compounds from benzylsulfonamides and formaldehyde is described using heteropolyacids H3PW12O40 and H3PMo12O40 supported on silica as catalysts.