389080-31-3

Upstream product

• 22288-78-4 Methyl 3-aminothiophene-2-carboxylate 
• 98-74-8 4-Nitrobenzenesulfonyl chloride 

Downstream Products

• 1155986-73-4 3-(4-nitro-benzenesulfonylamino)thiophene-2-carboxylic acid 
• 1207974-38-6 3-[methyl-(4-nitro-benzenesulfonyl)amino]thiophene-2-carboxylic acid methyl ester 
• 1374831-21-6 C₁₉H₁₅BrN₂O₆S₂ 

Relevant academic research and scientific papers

Palladium-Catalyzed Enantioselective 1,1-Fluoroarylation of Aminoalkenes

The development of an enantioselective palladium-catalyzed 1,1-fluoroarylation of unactivated aminoalkenes is described. The reaction uses arylboronic acids as the arene source and Selectfluor as the fluorine source to generate benzylic fluorides in good yields with excellent enantioselectivities. This transformation, likely proceeding through an oxidative Heck mechanism, affords 1,1-difunctionalized alkene products.

Synthesis and SAR studies of novel 1,2,4-oxadiazole-sulfonamide based compounds as potential anticancer agents for colorectal cancer therapy

A diverse series of 1,2,4-oxadiazoles based substituted compounds were designed, synthesized and evaluated as anticancer agents targeting carbonic anhydrase IX (CAIX). Initial structure-activity analysis suggested that the thiazole/thiophene-sulfonamide conjugates of 1,2,4-oxadiazoles exhibited potent anticancer activities with low μM potencies. Compound OX12 exhibited antiproliferative activity (IC50 = 11.1 μM) along with appreciable inhibition potential for tumor-associated CAIX (IC50 = 4.23 μM) isoform. Therefore, OX12 was structurally optimized and its SAR oriented derivatives (OX17-27) were synthesized and evaluated. This iteration resulted in compound OX27 with an almost two-fold increase in antiproliferative effect (IC50 = 6.0 μM) comparable to the clinical drug doxorubicin and significantly higher potency against CAIX (IC50 = 0.74 μM). Additionally, OX27 treatment decreases the expression of CAIX, induces apoptosis and ROS production, inhibited colony formation and migration of colon cancer cells. Our studies provide preclinical rational for the further optimization of identified OX27 as a suitable lead for the possible treatment of CRC.

A one-pot double C-H activation palladium catalyzed route to a unique class of highly functionalized thienoisoquinolines

The synthesis of a unique class of highly functionalized 3,4-thienoisoquinolines via an efficient palladium-catalyzed one-pot, regioselective double C-H activation is presented. This class of biologically relevant compounds has been prepared in five steps from commercially available starting materials with overall yields ranging from 27 to 62%. A masked carboxylic acid was used to direct C-H activation to the typically less reactive C4 position. Additionally, the carboxylic acid provides a synthetically useful handle for further functionalization.

Small molecule inhibitors of the neuropilin-1 vascular endothelial growth factor A (VEGF-A) interaction

We report the molecular design and synthesis of EG00229,2, the first small molecule ligand for the VEGF-A receptor neuropilin 1 (NRPl) and the structural characterization of NRPl-ligand complexes by NMR spectroscopy and X-ray crystallography. Mutagenesis studies localized VEGF-A binding in the NRPl bl domain and a peptide fragment of VEGF-A was shown to bind at the same site by NMR, providing the basis for small molecule design. Compound 2 demonstrated inhibition of VEGF-A binding to NRPl and attenuated VEGFR2 phosphorylation in endothelial cells. Inhibition of migration of endothelial cells was also observed. The viability of A549 lung carcinoma cells was reduced by 2, and it increased the potency of the cytotoxic agents paclitaxel and 5-fluorouracil when given in combination. These studies provide the basis for design of specific small molecule inhibitors of ligand binding to NRP1.