449806-69-3

Upstream product

• 61-90-5 L-leucine 
• 98-74-8 4-Nitrobenzenesulfonyl chloride 

Downstream Products

• 1220527-27-4 N-nosyl-L-leucine benzhydryl ester 
• 1448453-32-4 C₁₃H₁₉N₃O₅S 
• 154587-28-7 C₁₄H₂₀N₂O₆S 
• 852852-98-3 methyl (((4-nitrophenyl)sulfonyl)-L-leucyl)-L-alaninate 
• 1208119-45-2 N-nosyl-L-leucine phenacyl ester 
• 852853-08-8 N-(N-methyl-N-nosyl-L-leucyl)-L-alanine methyl ester 
• 103478-62-2 N-(9-fluorenylmethoxycarbonyl)-N-methyl-L-leucine 
• 610800-55-0 N-nosyl-L-leucine chloride 

Relevant academic research and scientific papers

Synthesis, characterization, molecular docking and in?vitro antimalarial properties of new carboxamides bearing sulphonamide

Sulphonamides and carboxamides have shown large number of pharmacological properties against different types of diseases among which is malaria. Twenty four new carboxamide derivatives bearing benzenesulphonamoyl alkanamides were synthesized and investigated for their in silico and in?vitro antimalarial and antioxidant properties. The substituted benzenesulphonyl chlorides (1a-c) were treated with various amino acids (2a-h) to obtain the benzenesulphonamoyl alkanamides (3a-x) which were subsequently treated with benzoyl chloride to obtain the N-benzoylated derivatives (5a-f, i-n and q-v). Further reactions of the N-benzoylated derivatives or proline derivatives with 4-aminoacetophenone (6) using boric acid as a catalyst gave the sulphonamide carboxamide derivatives (7a-x) in excellent yields. The in?vitro antimalarial studies showed that all synthesized compounds had antimalarial property. Compound 7k, 7c, 7l, 7s, and 7j had mean MIC value of 0.02, 0.03, 0.05, 0.06 and 0.08?μM respectively comparable with chloroquine 0.06?μM. Compound 7c was the most potent antioxidant agent with IC50 value of 0.045?mM comparable with 0.34?mM for ascorbic acid. In addition to the successful synthesis of the target molecules using boric acid catalysis, the compounds were found to have antimalarial and antioxidant activities comparable with known antimalarial and antioxidant drugs. The class of compounds reported herein have the potential of reducing oxidative stress arising from malaria parasite and chemotherapeutic agent used in the treatment of malaria.

Synthesis and Structure-Activity Relationships of Arylsulfonamides as AIMP2-DX2 Inhibitors for the Development of a Novel Anticancer Therapy

AIMP2-DX2, a splicing variant of AIMP2, is up-regulated in lung cancer, possesses oncogenic activity, and results in tumorigenesis. Specifically inhibiting the interaction between AIMP2-DX2 and HSP70 to suppress AIMP2-DX2-dependent cancers with small molecules is considered a promising avenue for cancer therapeutics. Optimization of hit BC-DXI-04 (IC50 = 40.1 μM) provided new potent sulfonamide based AIMP2-DX2 inhibitors. Among these, BC-DXI-843 showed improved inhibition against AIMP2-DX2 (IC50 = 0.92 μM) with more than 100-fold selectivity over AIMP2 in a luciferase assay. Several binding assays indicated that this compound effectively induces cancer cell apoptosis by specifically interrupting the interaction between DX2 and HSP70, which leads to the degradation of DX2 via Siah1-mediated ubiquitination. More importantly, BC-DXI-843 demonstrated in vivo efficacy in a tumor xenograft mouse model (H460 cells) at a dosage of 50 mg/kg, suggesting it as a promising lead for development of novel therapeutics targeting AIMP2-DX2 in lung cancer.

Synthesis, characterization and in vitro antitrypanosomal activities of new carboxamides bearing quinoline moiety

The reported toxicities of current antitrypanosomal drugs and the emergence of drug resistant trypanosomes underscore the need for the development of new antitrypanosomal agents. We report herein the synthesis and antitrypanosomal activity of 24 new amide derivatives of 3-aminoquinoline, bearing substituted benzenesulphonamide. Nine of the new derivatives showed comparable antitrypanosomal activities at IC50 range of 1–6 nM (melarsoprol 5 nM). Compound 11n and 11v are more promising antitrypanosomal agents with IC50 1.0 nM than the rest of the reported derivatives. The novel compounds showed satisfactory predicted physico-chemical properties including oral bioavailability, permeability and transport properties.

Novel anti-inflammatory and analgesic agents: synthesis, molecular docking and in vivo studies

Twelve new derivatives of benzothiazole bearing benzenesulphonamide and carboxamide were synthesised and investigated for their in vivo anti-inflammatory, analgesic and ulcerogenic activities. Molecular docking showed an excellent binding interaction of t

New carboxamide derivatives bearing benzenesulphonamide as a selective COX-II inhibitor: Design, synthesis and structure-activity relationship

Sixteen new carboxamide derivatives bearing substituted benzenesulphonamide moiety (7a-p) were synthesized by boric acid mediated amidation of appropriate benzenesulphonamide with 2-amino-4-picoline and tested for anti-inflammatory activity. One compound 7c showed more potent anti-inflammatory activity than celecoxib at 3 h in carrageenan-induced rat paw edema bioassay. Compounds 7g and 7k also showed good anti-inflammatory activity comparable to celecoxib. Compound 7c appeared selectivity index (COX-2/COX-1) better than celecoxib. Compound 7k appeared selectivity index (COX-2/COX-1) a little higher than the half of celecoxib while compound 7g is non-selective for COX-2. The LD50 of compounds 7c, 7g and 7k were comparable to celecoxib.

1-Organosulfonyl-2-sila-5-piperazinones: Synthesis, molecular and crystal structure, and chemical transformations into 2-aminoacid derivatives

The reaction of chloro(chloromethyl)dimethylsilane and hexamethyldisilazane with N-methylamides of N0-organosulfonyl-2-amino acids (1aee), the derivatives of N-mesylglycine (a), N-tosylglycine (b), Nnosylglycine (c), N-nosylalanine (d) and N-nosylleucine (e), affords new type of silacyclanes, 1-organosulfonyl-2- sila-5-piperazinones 2aee. The presence of very labile SieN bonds in compounds 2 can be utilised in a variety of synthetic applications. The hydrolysis of 2aee yields disiloxanes 3aee, which can be subsequently transformed into fluorosilanes, such as 4a, by the reaction with boron trifluoride. Ring-opening reactions of piperazinones 2b with 1-chloromethyl-2-pyrrolidone and acetyl bromide lead to previously unknown silyloxonium chloride 6b and silyloxonium bromide 8b, respectively, containing fragments of 2-amino acids as C,O-chelate ligands. Crystal structures of N-methylamide 1b, piperazinones 2a, d, e, disiloxanes 3c, e, fluorosilane 4a, silyloxonium chloride 6b and silyloxonium bromide 8b have been determined by X-ray diffraction study. The silicon atom in piperazinones and disiloxanes is tetracoordinated while compounds 4a, 6b and 8b contain pentacoordinated Si atoms. Crown Copyright.

The dimethylsulfoxonium methylide as unique reagent for the simultaneous deprotection of amino and carboxyl function of N-Fmoc-α-amino acid and N-Fmoc-peptide esters

The dimethylsulfoxonium methylide is described as a unique and useful reagent for the simultaneous deprotection of amino and carboxyl function of N-Fmoc-α-amino acid and N-Fmoc-peptide esters. The new methodology was applied successfully both to solution- and solid-phase peptide synthesis. The adopted methodology was extended successfully also to peptides containing amino acids bearing acid-sensitive protecting group in side chains. Furthermore no measurable epimerization was observed in the deprotection reaction of N-Fmoc-dipeptide methyl esters with dimethylsulfoxonium methylide.

N-methyl-N-nosyl-β3-amino acids

(Chemical Equation Presented) N-Methyl-β3-amino acids are important building blocks in the synthesis of biologically active molecules. A very simple and efficient approach to transform natural α-amino acids into their corresponding N-methyl-βs

N-methylation of peptides on selected positions during the elongation of the peptide chain in solution phase

An efficient and general solution-phase method for the site-specific N-methylation of peptides has been developed. This novel procedure involves synthesis of N-nosyl protected peptides and their subsequent N-methylation with diazomethane. Its efficiency w

HIV protease inhibitors based on amino acid derivatives

A compound selected from the group consisting of a compound of formula I 1a compound of formula II 2and when the compound of formula I and II comprises an amino group pharmaceutically acceptable ammonium salts thereof, wherein R1, R2, Cx, n, R3, R4, R5, Y are as defined in the specification.