磺酰胺基团被用作吸电子基团,以增强基于尿素的受体的阴离子络合特征。合成并彻底测试了一系列磺酰胺基和尿素NH基团的酸度变化的受体。各个络合性质反映了给定分子中作为取代的函数的去质子/络合平衡。含有缀合sulphonamidic部分给电子基团的受体显示出朝向h时缔合常数2 PO 4 -和羧酸根阴离子,而那些含有吸电子基团倾向于sulphonamidic N中的去质子化ħ。可以通过在受体合成的早期阶段进行烷基化来避免去质子化问题,也可以将其用于插入合适的基团,从而使其锚定在各种底物上,从而形成更精细的受体结构。
Sulfonamide Inhibitors of β‐Catenin Signaling as Anticancer Agents with Different Output on c‐MYC
作者:Laura Di Magno、Fiorella Di Pastena、Michela Puxeddu、Giuseppe La Regina、Antonio Coluccia、Alessia Ciogli、Simone Manetto、Marella Maroder、Gianluca Canettieri、Romano Silvestri、Marianna Nalli
DOI:10.1002/cmdc.202000594
日期:2020.12.3
The Wnt/β‐catenin pathway is often found deregulated in cancer. The aberrant accumulation of β‐catenin in the cell nucleus results in the development of various malignancies. Specific drugs against this signalingpathway for clinical treatments have not been approved yet. Herein we report inhibitors of β‐catenin signaling of potential therapeutic value as anticanceragents. Ethyl 4‐((4‐(trifluorom
Arylation and alkenylation of activated alkyl halides using sulfonamides
作者:Stuart Johnson、Ervin Kovács、Michael F. Greaney
DOI:10.1039/d0cc00220h
日期:——
of quaternary aryl amino acid derivatives can be synthesised using tandem SN2/Smiles rearrangement chemistry involving aryl sulfonamides and α-chloro carbonylcompounds. The reaction harnesses a sulfur dioxide extrusion pathway to construct a C-N and C-Caryl bond under simple conditions with no requirement for organometallics or transition metal catalysts. The reaction is also successful for alkenyl
conjugation to the sulphonamidic moiety showed higher association constants towards H2PO4− and carboxylate anions, while those containing electron‐withdrawing groups inclined to deprotonation of sulphonamidic NH . The deprotonation issue can be avoided by alkylation at the early step of receptor synthesis or it can be utilized for insertion of suitable groups that enable its anchoring on various substrates
磺酰胺基团被用作吸电子基团,以增强基于尿素的受体的阴离子络合特征。合成并彻底测试了一系列磺酰胺基和尿素NH基团的酸度变化的受体。各个络合性质反映了给定分子中作为取代的函数的去质子/络合平衡。含有缀合sulphonamidic部分给电子基团的受体显示出朝向h时缔合常数2 PO 4 -和羧酸根阴离子,而那些含有吸电子基团倾向于sulphonamidic N中的去质子化ħ。可以通过在受体合成的早期阶段进行烷基化来避免去质子化问题,也可以将其用于插入合适的基团,从而使其锚定在各种底物上,从而形成更精细的受体结构。
p-[(2-Amino-4-hydroxy-6-pteridylmethyl)-p' -nitrobenzenesulfonylamino]-benzoic Acid and Intermediates