53370-84-6

Upstream product

• 507-40-4 tert-butylhypochlorite 
• 538-32-9 benzylurea 
• 24469-50-9 t-butyl 3-benzylidenecarbazate 
• 24424-99-5 di-tert-butyl dicarbonate 
• 555-96-4 Benzylhydrazine 
• 24469-50-9 N'-(phenylmethylene)hydrazinecarboxylic acid tert-butyl ester 
• 100-46-9 benzylamine 
• 462100-44-3 oxaziridine-2,3,3-tricarboxylic acid 2-tert-butyl ester 3,3-diethyl ester 
• 100-52-7 benzaldehyde 
• 36016-38-3 tert-Butyl N-hydroxycarbamate 
• 105838-14-0 tert-butyl N-tosyloxycarbamate 
• 100-51-6 benzyl alcohol 
• 870-46-2 t-butoxycarbonylhydrazine 
• 408346-61-2 2-(N-tert-butoxycarbonylimino)malonic acid diethyl ester 

Downstream Products

• 57699-63-5 N-t-butoxycarbonyl-azaphenylalanine ethyl ester 
• 57699-97-5 N^α-benzyl-N^α-(benzyloxycarbonyl)-N^β-(tert-butyloxycarbonyl)hydrazine 
• 53370-83-5 Boc-α-azaphenylalaninphenylester 
• 57699-78-2 N-tert-Butoxycarbonyl-α-azaphenylalanin-(2,4,5-trichlor-phenyl)-ester 
• 57699-70-4 C₁₃H₁₉N₃O₃ 
• 57700-01-3 Boc-AzaPhe-Leu-OMe 
• 98381-02-3 t-butyl 2-acetoacetyl-2-benzylhydrazine-1-carboxylate 
• 148762-52-1 2-(tert-butyl) 1-(4-nitrophenyl) 1-benzylhydrazine-1,2-dicarboxylate 
• 98381-01-2 tert-butyl 2-benzyl-2-(3-ethoxy-3-oxopropanoyl)hydrazine-1-carboxylate 
• 128719-03-9 N-tert-butoxycarbonyl-α-azaphenylalanyl-L-cysteinyl(Acm)-D-tryptophyl-L-leucine methyl ester 
• 150767-06-9 1-[2(S)-Hydroxy-3(S)-(benzyloxycarbonylamino)-4-phenyl-butyl]-1-[phenylmethyl]-2-[tert-butoxycarbonyl]-hydrazine 
• 159525-95-8 sulfonyl-L-proline benzyl ester 
• 121732-65-8 Boc-Azaphe-Gly-OEt 
• 1073-62-7 N-benzylhydrazine hydrochloride 

Relevant academic research and scientific papers

THIOSEMICARBAZATES AND USES THEREOF

Thioesters, thiocarbamates, thiocarbazates, semithiocarbazates, peptides, aza-amino acid conjugates, and azapeptides; and a chemoselective and site-specific functionalization protocol of protected thiocarbazates and semithiocarbazates are described. The protocol features the use of Mitsunobu reaction to alkylate specifically the nitrogen atom close to the acylthiol moiety with alcohols to produce protected mono-substituted thiocarbazates that can be stored for months, activated under mild conditions at low temperature using halonium reagents and integrated orthogonally to make substituted semicarbazides that can be used, e.g., as synthons in synthesis of aza-amino acid conjugates, azapeptides and other peptidomimetics. Methods for preparing and using ureases, carbazides, semicarbazides, beta-peptides, azapeptides, and other peptidomimetics and azapeptide conjugates, and uses of ureases, carbazides, semicarbazides, beta-peptides, azapeptides in drug discovery, diagnosis, inhibition, prevention and treatment of diseases are also described.

Discovery, synthesis and characterization of a series of (1-alkyl-3-methyl-1H-pyrazol-5-yl)-2-(5-aryl-2H-tetrazol-2-yl)acetamides as novel GIRK1/2 potassium channel activators

The present study describes the discovery and characterization of a series of 5-aryl-2H-tetrazol-3-ylacetamides as G protein-gated inwardly-rectifying potassium (GIRK) channels activators. Working from an initial hit discovered during a high-throughput screening campaign, we identified a tetrazole scaffold that shifts away from the previously reported urea-based scaffolds while remaining effective GIRK1/2 channel activators. In addition, we evaluated the compounds in Tier 1 DMPK assays and have identified a (3-methyl-1H-pyrazol-1-yl)tetrahydrothiophene-1,1-dioxide head group that imparts interesting and unexpected microsomal stability compared to previously-reported pyrazole head groups.

Synthesis of Macrocycles Derived from Substituted Triazines

A triazine ring derivatized with morpholine, an N-alkyl-N′-BOC-hydrazine (alkyl=isopropyl or benzyl) and the diethylacetal of glycinylpropionaldehyde undergoes spontaneous dimerization in good yields upon acid-catalyzed deprotection. The resulting 24-member macrocycles can be characterized by NMR spectroscopy, mass spectrometry, and single crystal X-ray diffraction. In the solid state, both homodimers adopt a taco-like conformation. Although each shows π–π stacking between the triazine rings, different patterns of hydrogen bonds emerge. The crystal structure of the isopropyl dimer shows that it includes two molecules of trifluoracetic acid per macrocycle. The trifluoroacetate anion charge balances the protonated triazines, which engage in bifurcated hydrogen bonds with the carbonyl acceptor of the distant glycine. This carbonyl also forms a hydrogen bond with the NH of the proximate glycine. The crystal structure of the benzyl derivative does not include trifluoracetic acid. Instead, two hydrogen bonds form, each between a glycine NH and the lone pair of the C=N nitrogen of the hydrazine group. In the solid state, both molecules present the alkyl side chains and morpholine groups in close proximity. A heterodimer is accessible in approximately statistical yields—along with both homodimers—by mixing the two protected monomers prior to subjecting them to deprotection.

Synthesis of Highly Substituted 1,2-Diazetidin-3-ones, Small-Ring Scaffolds for Drug Discovery

1,2-Diazetidin-3-ones are readily accessible, small ring scaffolds that upon functionalization have the potential to produce diverse 3-dimensional structures for drug discovery. Thus, treatment of diazo hydrazides, obtained from simple hydrazides and malonyl half ester derivatives, followed by diazo transfer, with catalytic amounts of rhodium(II) acetate dimer results in intramolecular carbenoid N?H insertion to give 1,2-diazetidin-3-ones. Although subsequent functionalization reactions could be hampered by the lability of the 4-membered ring, a wide range of new derivatives was available by deprotection at N-1, and subsequent amide or urea formation. The structures of four four-membered rings was confirmed by X-ray crystallography; the compounds showed modest growth inhibitory activity in mammary carcinoma cells.

Towards a general synthesis of di-aza-amino acids containing peptides

While the incorporation of one aza-amino acid in peptides has been proved to be beneficial for inducing a structure constraint, increasing the resistance towards proteolysis and improving the biological activity, only very rare examples of the incorporation of two or more consecutive aza-amino acids have been reported. In this work, we demonstrate that this fact is probably due to the unsuspected difficulty in synthesizing such peptide analogues, as illustrated by the synthesis of tripeptide derivatives containing two consecutive aza-amino acids. Herein, we report some general guidelines regarding the activation and the coupling of alkyl-hydrazides either mutually or with a natural amino acid, taking into account their nucleophilicity and the nature of their side chains.

Exploration of a Au(i)-mediated three-component reaction for the synthesis of DNA-tagged highly substituted spiroheterocycles

We demonstrate a Au(i)-mediated three-component reaction to DNA-tagged highly substituted 6-oxa-1,2-diazaspiro[4.4]nonanes from either DNA-coupled aldehydes, hydrazides, or alkynols. The choice of the starting material coupled to the DNA tag was critial for the purity of the product as the DNA-aldehyde conjugate yielded the purest products, whereas the alkynol- and hydrazide conjugates returned complex product mixtures. The reaction was compatible with thymine-, cytosine-, and, surprisingly, with adenine-DNA, while guanine-containing DNA strands were degraded under the reaction conditions.

As the NS4B inhibitor benzofuran analogs (by machine translation)

The present invention discloses a kind of as NS4B benzofuran analogue inhibitors, in particular to the formula (I) below or a pharmaceutically acceptable salt thereof. (by machine translation)

Gold-catalyzed three-component spirocyclization: A one-pot approach to functionalized pyrazolidines

An efficient, highly atom economic synthesis of hitherto unknown spirocyclic pyrazolidines in a one-pot process was developed. The gold-catalyzed three-component coupling of alkynols, hydrazines and aldehydes or ketones likely proceeds via cycloisomerization of the alkynol to an exocyclic enol ether and subsequent [3 + 2]-cycloaddition of an azomethine ylide. A library of 29 derivatives with a wide range of functional groups was synthesized in up to 97% yield. With this new method, every position in the final product can be substituted which renders the method ideal for applications in combinatorial or medicinal chemistry.

Synthesis and biological evaluation of Hydrazone derivatives as antifungal agents

Emerging yeasts are among the most prevalent causes of systemic infections with high mortality rates and there is an urgent need to develop specific, effective and non-Toxic antifungal agents to respond to this issue. In this study 35 aldehydes, hydrazones and hydrazines were obtained and their antifungal activity was evaluated against Candida species (C. parapsilosis, C.Tropicalis, C. krusei, C. albicans, C. glabrata and C. lusitaneae) and Trichosporon asahii, in an in vitro screening. The minimum inhibitory concentrations (MICs) of the active compounds in the screening was determined against 10 clinical isolates of C. parapsilosis and 10 of T. asahii. The compounds 4-pyridin-2-ylbenzaldehyde] (13a) and tert-butyl-(2Z)-2-(3,4,5-Trihydroxybenzylidine)hydrazine carboxylate (7b) showed the most promising MIC values in the range of 16-32 μg/mL and 8-16 μg/mL, respectively. The compounds' action on the stability of the cell membrane and cell wall was evaluated, which suggested the action of the compounds on the fungal cell membrane. Cell viability of leukocytes and an alkaline comet assay were performed to evaluate the cytotoxicity. Compound 13a was not cytotoxic at the active concentrations. These results support the discovery of promising candidates for the development of new antifungal agents.

Phenylalanine-based inactivator of akt kinase: Design, synthesis, and biological evaluation

Strategies to inhibit kinases by targeting the substrate binding site offer many advantages, including naturally evolved selectivity filters, but normally suffer from poor potency. In this work we propose a strategy to design and prepare covalent substrate-competitive kinase inhibitors as a method to improve potency. We have chosen AKT as the model kinase for this work. Using the AKT-GSK3β cocrystal structure and a reactive cysteine near the substrate binding site, we have identified phenylalanine (Phe) as an appropriate scaffold for the covalent inactivator portion of these inhibitors. By synthesizing compounds that incorporate cysteine-reactive electrophiles into phenylalanine and testing these compounds as AKT inhibitors, we have identified Boc-Phe-vinyl ketone as a submicromolar inactivator of AKT. We also show that Boc-Phe-vinyl ketone (1) potently inhibits AKT1 and inhibits cell growth in HCT116 and H460 cells nearly as well as AKT inhibitors GSK690693 and MK-2206, (2) is selective for kinases that possess an activation loop cysteine such as AKT, (3) requires the vinyl ketone for inactivation, (4) has inactivation that is time-dependent, and (5) alkylates Cys310 of AKT as shown by mass spectrometry. Identification of Boc-Phe-vinyl ketone as a covalent inactivator of AKT will allow the development of peptide and small-molecule substrate-competitive covalent kinase inhibitors that incorporate additional substrate binding elements to increase selectivity and potency. This proof-of-principle study also provides a basis to apply this strategy to other kinases of the AGC and CAMK families.