51871-42-2Relevant academic research and scientific papers
Stereoretentive Reactions at the Anomeric Position: Synthesis of Selenoglycosides
Zhu, Feng,O'Neill, Sloane,Rodriguez, Jacob,Walczak, Maciej A.
supporting information, p. 7091 - 7095 (2018/05/29)
Reported is the stereospecific cross-coupling of anomeric stannanes with symmetrical diselenides, resulting in the synthesis of selenoglycosides with exclusive anomeric control. The reaction proceeds without the need for directing groups and is compatible
Microwave-Assisted Synthesis of 2,2′-Azopyridine-Labeled Amines, Amino Acids, and Peptides
Avan, Ilker
supporting information, p. 365 - 378 (2016/01/28)
A microwave-assisted procedure for labeling amines, amino acids, and peptides with 2,2′-azopyridines (2,2′-AzPy) is described using the corresponding 2,2′-azopyridine-diacylbenzotriazoles. The efficiency of the procedure is proven by the generation of thr
Microwave-assisted chemical ligation of S-acyl peptides containing non-terminal cysteine residues
Hansen, Finn K.,Ha, Khanh,Todadze, Ekaterina,Lillicotch, Aaron,Frey, Alexander,Katritzky, Alan R.
supporting information; experimental part, p. 7162 - 7167 (2011/11/14)
An efficient approach for the synthesis of a series of S-acyl peptides containing internal cysteine residues has been developed and the chemical long-range ligation of these S-acyl peptides via 5-, 8-, 11- and 14-membered cyclic transition states has been
Synthesis and pharmacological investigation of segetalin C as a novel antifungal and cytotoxic agent
Dahiya, Rajiv,Kaur, Komalpreet
, p. 29 - 34 (2008/09/19)
In present study, a natural phenylalanine-rich cycloheptapeptide segetalin C (compound VIII) was synthesized by coupling and cyclization of peptide units Boc-gly-L-leu-L-his-OH and L-Phe-L-ala-L-phe-L-pro-OMe and examined for different bioactivities. The
Phenylhydrazide as an enzyme-labile protecting group in peptide synthesis
Voelkert, Martin,Koul, Surrinder,Mueller, Gernot H.,Lehnig, Manfred,Waldmann, Herbert
, p. 6902 - 6910 (2007/10/03)
The enzymatic cleavage of amino acid phenylhydrazides with the enzyme tyrosinase (EC 1.14.18.1) offers a new, mild, and selective method for C-terminal deprotection of peptides. The advantages of the described methodology are the very mild oxidative removal of the protecting group at room temperature and pH 7, a high chemo- and regioselectivity, and the availability of the biocatalyst. Even in oxygen-saturated solution, the oxidation of sensitive methionine residues was not observed. These features make the methodology suitable for the synthesis of sensitive peptide conjugates. Mechanistic data suggest that the hydrolysis of the oxidized adducts proceeds by a free-radical mechanism.
Comparative lipase-catalyzed hydrolysis of ethylene glycol derived esters. The 2-methoxyethyl ester as a protective group in peptide and glycopeptide synthesis
Gewehr, Markus,Kunz, Horst
, p. 1499 - 1510 (2007/10/03)
Comparison of the lipase-catalyzed cleavage of polar esters derived from ethylene glycol proved 2-methoxyethyl (ME) esters most favorable protecting groups for the carboxylic function of peptides and glycopeptides. They combine high substrate acceptance and iligh yields of hydrolysis with favorable physicochemical properties and advantageous solubility. The application of this polar ester as protecting group was extended to N-glycosylated amino acids and N-glycopeptides. The selective removal of ME esters by lipases was achieved under mild conditions (pH 7.0 and 37°C), leaving all other linkages including peptide bonds and other ester protecting groups unaffected.
Polypeptide derivatives
-
, (2008/06/13)
Novel synthetic polypeptide derivatives, i.e., novel calcitonin derivatives, having improved basic physiological activities of the corresponding natural calcitonins, i.e., the activity for lowering the blood level of calcium, the activity as an analgesic, as well as the activity for inhibiting the secretion of the gastric juice. Thus these synthetic calcitonins are effective as agents for curing hypercalcemia, analgetic agents, anti-ulcerative agents and the like.
SOLUTION PHASE SYNTHESIS OF ALAMETHICIN I
Nagaraj, R.,Balaram, P.
, p. 1263 - 1270 (2007/10/02)
The total synthesis of alamethicin I by solution phase methods is reported.
Synthetic antigens of luteinizing hormone releasing hormone
-
, (2008/06/13)
Synthetic antigens related to luteinizing hormone-releasing hormone (hereinafter designated LH-RH) having the amino acid composition, pyroglutamyl-histidyl-tryptophanylseryl-tyrosyl-glycyl-leucyl-arginyl-prolyl-glycyl-poly-L-lysine (hereinafter designated pyroglu-his-trp-ser-tyr-glyleu-arg-pro-gly-poly-L-lys) and poly-L-lysyl-glutarylhistidyl-tryptophanyl-seryl-tyrosyl-glycyl-leucyl-arginylprolyl-glycine amide (hereinafter designated poly-L-lysglutaryl-his-trp-ser-tyr-gly-leu-arg-pro-gly) are prepared by coupling the corresponding decapeptide with poly-L-lysine. The corresponding decapeptides are prepared by controlled stepwise procedures starting with individual amino acid components. These antigens have the property of inducing formation of antibodies to luteinizing hormone-releasing hormone (LH-RH) in animals.
