Nα,Nω,Nω'-Tris-Boc-L-arginine
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Nα,Nω,Nω'-Tris-Boc-L-arginine

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Category
BOC-Amino Acids
Catalog number
BAT-002909
CAS number
97745-69-2
Molecular Formula
C21H38N4O8
Molecular Weight
474.56
Nα,Nω,Nω'-Tris-Boc-L-arginine
IUPAC Name
(2S)-5-[bis[(2-methylpropan-2-yl)oxycarbonylamino]methylideneamino]-2-[(2-methylpropan-2-yl)oxycarbonylamino]pentanoic acid
Synonyms
Boc-L-Arg(Boc)2-OH; (2S)-5-[bis[(2-methylpropan-2-yl)oxycarbonylamino]methylideneamino]-2-[(2-methylpropan-2-yl)oxycarbonylamino]pentanoic acid; Nalpha,Nomega,Nomega'-Tris-Boc-L-arginine; BOC-ARG(BOC)2-OH; (S,E)-5-(2,3-Bis(tert-butoxycarbonyl)guanidino)-2-((tert-butoxycarbonyl)amino)pentanoic acid
Appearance
White powder
Purity
99-100% (Assay by titration)
Density
1.18±0.1 g/cm3
Melting Point
116-120 °C
Storage
Store at -20 °C
InChI
InChI=1S/C21H38N4O8/c1-19(2,3)31-16(28)23-13(14(26)27)11-10-12-22-15(24-17(29)32-20(4,5)6)25-18(30)33-21(7,8)9/h13H,10-12H2,1-9H3,(H,23,28)(H,26,27)(H2,22,24,25,29,30)/t13-/m0/s1
InChI Key
BGOFOVHACSQSIE-ZDUSSCGKSA-N
Canonical SMILES
CC(C)(C)OC(=O)NC(CCCN=C(NC(=O)OC(C)(C)C)NC(=O)OC(C)(C)C)C(=O)O

Nα,Nω,Nω'-Tris-Boc-L-arginine, commonly known as Boc-L-arginine, serves as a critical reagent in the realm of peptide synthesis. It is frequently employed as an intermediate in the formation of peptides and proteins due to its protective Boc (tert-butyloxycarbonyl) groups. These groups shield the amino functionalities during chemical reactions, preventing unwanted side reactions and ensuring a higher purity of the final product. The result is a more efficient and reliable synthesis process, which is particularly advantageous in the pharmaceutical industry, where precise peptide sequences are often integral to drug development.

Another prominent application of Nα,Nω,Nω'-Tris-Boc-L-arginine is in the modification of biomolecules. By selectively deprotecting specific sites, researchers can introduce modifications such as fluorescent labels, biotin, or other functional groups. This selective modification capability is crucial in the study of protein-protein interactions, cellular signaling pathways, and other biological processes. The ability to produce labeled or modified peptides also enhances their utility in diagnostic assays and imaging techniques, making Boc-L-arginine an indispensable tool in molecular biology and bioengineering.

Nα,Nω,Nω'-Tris-Boc-L-arginine is also valuable in the production of synthetic enzymes and therapeutic compounds. Enzyme mimicry and the synthetic creation of enzyme analogs are growing fields in biotechnology, aimed at developing novel catalysts and therapeutic agents. Boc-L-arginine helps in constructing arginine-rich active sites or binding pockets critical for catalytic activity. These synthetic constructs can then be used to mimic natural enzyme functions or to develop novel drugs with enzymatic properties, such as protease inhibitors or substrates for enzyme assays. This expands the possibilities for new treatments and industrial catalysts.

Lastly, Nα,Nω,Nω'-Tris-Boc-L-arginine is essential in the field of combinatorial chemistry. This approach involves creating libraries of diverse molecular variants to identify compounds with desirable properties, such as high binding affinity or specific reactivity. Boc-L-arginine, with its protected amino groups, allows for the systematic variation of peptide sequences and the subsequent rapid screening of their properties. Such combinatorial techniques are pivotal in drug discovery, enabling the identification of potential new drug candidates from a large pool of variants in a relatively short time. This accelerates the development pipeline and increases the likelihood of finding effective therapeutic agents.

1. Selective L-nitroargininylaminopyrrolidine and L-nitroargininylaminopiperidine neuronal nitric oxide synthase inhibitors
Jiwon Seo, Pavel Martásek, Linda J Roman, Richard B Silverman Bioorg Med Chem. 2007 Mar 1;15(5):1928-38. doi: 10.1016/j.bmc.2007.01.001. Epub 2007 Jan 4.
Selective inhibition of the localized excess production of NO by neuronal nitric oxide synthase (nNOS) has been targeted as a potential means of treating various neurological disorders. Based on observations from the X-ray crystal structures of complexes of nNOS with two nNOS-selective inhibitors, (4S)-N-{4-amino-5-[(2-amino)ethylamino]pentyl}-N'-nitroguanidine (L-Arg(NO2)-L-Dbu-NH2 (1) and 4-N-(Nomega-nitro-L-argininyl)-trans-4-amino-L-proline amide (2), a series of descarboxamide analogues was designed and synthesized (3-7). The most potent compound was aminopyrrolidine analogue 3, which exhibited better potency and selectivity for nNOS than parent compound 2. In addition, 3 provided higher lipophilicity and a lower molecular weight than 2, therefore having better physicochemical properties. Nalpha-Methylated analogues (8-11) also were prepared for increased lipophilicity of the inhibitors, but they had 4- to 5-fold weaker binding affinity compared to their parent compounds.
2. Structural basis of ligand binding modes at the neuropeptide Y Y1 receptor
Zhenlin Yang, et al. Nature. 2018 Apr;556(7702):520-524. doi: 10.1038/s41586-018-0046-x. Epub 2018 Apr 18.
Neuropeptide Y (NPY) receptors belong to the G-protein-coupled receptor superfamily and have important roles in food intake, anxiety and cancer biology 1,2 . The NPY-Y receptor system has emerged as one of the most complex networks with three peptide ligands (NPY, peptide YY and pancreatic polypeptide) binding to four receptors in most mammals, namely the Y1, Y2, Y4 and Y5 receptors, with different affinity and selectivity 3 . NPY is the most powerful stimulant of food intake and this effect is primarily mediated by the Y1 receptor (Y1R) 4 . A number of peptides and small-molecule compounds have been characterized as Y1R antagonists and have shown clinical potential in the treatment of obesity 4 , tumour 1 and bone loss 5 . However, their clinical usage has been hampered by low potency and selectivity, poor brain penetration ability or lack of oral bioavailability 6 . Here we report crystal structures of the human Y1R bound to the two selective antagonists UR-MK299 and BMS-193885 at 2.7 and 3.0 Å resolution, respectively. The structures combined with mutagenesis studies reveal the binding modes of Y1R to several structurally diverse antagonists and the determinants of ligand selectivity. The Y1R structure and molecular docking of the endogenous agonist NPY, together with nuclear magnetic resonance, photo-crosslinking and functional studies, provide insights into the binding behaviour of the agonist and for the first time, to our knowledge, determine the interaction of its N terminus with the receptor. These insights into Y1R can enable structure-based drug discovery that targets NPY receptors.
3. Biological properties of arginine-based gemini cationic surfactants
Lourdes Pérez, Maria Teresa García, Isabel Ribosa, Maria Pilar Vinardell, Angeles Manresa, Maria Rosa Infante Environ Toxicol Chem. 2002 Jun;21(6):1279-85.
Biological properties of novel gemini (double-chain/double-head) cationic surfactants, Nalpha,Nomega-bis(Nalpha-acylarginine)alpha,omega-alkylendiamides, so-called bis(Args), are reported. The effect of both the alkyl (10 and 12 carbon atoms) and the spacer chain (from 2-10 methylene groups) of bis(Args) on their antimicrobial activity, acute toxicity on Daphnia magna and Photobacterium phosphoreum, and aerobic biodegradability is studied. These surfactants constitute a novel class of chemicals of low toxicity with excellent surface properties and considerable antimicrobial activity. The aquatic toxicity of these compounds is lower than that of the conventional Monoquats. As regards the biodegradation test, the molecules with a spacer chain < or =6 methylene groups can be considered as ready biodegradable. The increase of hydrophobicity in the bis(Args) is a negative structural parameter for their environmental behavior.
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