98714-71-7

Upstream product

• 13257-67-5 2-amino-2-methylpropionic acid methyl ester 
• 769922-77-2 (S)-benzyl (1-(1H-benzo[d][1,2,3]triazol-1-yl)-1-oxo-3-phenylpropan-2-yl)carbamate 
• 501-53-1 benzyl chloroformate 
• 73048-81-4 benzyl (S)-(1-(hydroxyamino)-1-oxo-3-phenylpropan-2-yl)carbamate 
• 1161-13-3 N-Cbz-L-Phe 
• 63-91-2 L-phenylalanine 
• 15028-41-8 methyl 2-aminoisobutyrate hydrochloride 
• 41518-17-6 Z-Phe-O-COO-isoBu 

Downstream Products

• 143868-66-0 Z-Trp-Aib-Phe-Aib-Trp-Aib-Trp-Glyol 
• 143868-65-9 H-Trp-Aib-Phe-Aib-Trp-Aib-Trp-Glyol 
• 143868-68-2 Z-Phe-Aib-Trp-Aib-Trp-Glyol 
• 143868-67-1 H-Phe-Aib-Trp-Aib-Trp-Glyol 
• 109772-33-0 N-benzyloxycarbonyl-L-phenylalanyl-2-methylalanine 

Relevant academic research and scientific papers

Iodine-Mediated Oxidative Coupling of Hydroxamic Acids with Amines towards a New Peptide-Bond Formation

An efficient and straightforward approach for the coupling of Nα-protected hydroxamic acids with an amino component in the presence of iodine is delineated. The reaction is mediated by the formation of unstable but reactive acyl nitroso intermediates. The peptide hydroxamic acids were found to be useful substrates in coupling reactions.

Practical Peptide Synthesis Mediated by a Recyclable Hypervalent Iodine Reagent and Tris(4-methoxyphenyl)phosphine

6-(3,5-Bis(trifluoromethyl)phenyl)-1H,4H-2aλ3-ioda-2,3-dioxacyclopenta[hi]indene-1,4-dione (p-BTFP-iodosodilactone, 1a) was synthesized and demonstrated to be an efficient hypervalent iodine(III) reagent for the synthesis of dipeptides from various standard amino acids, including sterically hindered amino acids, in good to high yields within 30 min in the presence of tris(4-methoxyphenyl)phosphine. In addition, the combined system of 1a/(4-MeOC6H4)3P was used to synthesize the pentapeptide leu-enkephalin in protected form. It is worth noting that 1a can be regenerated readily after reaction.

Efficient peptide coupling involving sterically hindered amino acids

(Chemical Equation Presented) Hindered amino acids have been introduced into peptide chains by coupling N-(Cbz- and Fmoc-α-aminoacyl) benzotriazoles with amino acids, wherein at least one of the components was sterically hindered, to provide compounds 3a-e, (3c +3 c′), 5a-d, (5a + 5a′), 6a-c, (6b + 6b′), 8a-c, 9a-e, 10a-d, and (10a + 10a′) in isolated yields of 41-95% with complete retention of chirality as evidenced by NMR and HPLC analysis. The benzotriazole activation methodology is a new route for the synthesis of sterically hindered peptides. (Note: compound numbers written within brackets represent diastereomeric mixtures or racemates; compound numbers without brackets represent enantiomers.)

Influence of solvent viscosity on the rate of hydrolysis of dipeptides by carboxypeptidase Y

The influence of solvent viscosity on the rate of enzymatic hydrolysis of a series of dipeptides (Z-Phe-Gly, Z-Phe-Sar, Z-Phe-Ala, Z-Phe-NMeAla, Z-Phe-Aib and Z-Phe-Pro) by carboxypeptidase Y was investigated. The effect of solvent viscosity on the enzymatic hydrolysis revealed that whereas all Kcat values decreased with viscosity, those of the N-alkyl peptides decreased more than those of the N-H peptides. The kinetic behaviour implies the involvement of conformational changes of the enzyme in terms of the 'induced-fit' process. Copyright

Fluorous Coupling Reagents: Application of 2-Chloro-4,6- bis[(heptadecafluorononyl)oxy]-1,3,5-triazine in Peptide Synthesis

Benzyloxycarbonyl N-protected and C-terminus methyl ester protected amino acids react in THF in the presence of 4-methylmorpholine and fluorous condensation reagent, 2-chloro-4,6-bis[(heptadecafluorononyl)oxy[-1,3,5- triazine, to form di- and tripeptides

Relationship between the hydrophobicity of dipeptides and the Michaelis-Menten constant Km of their hydrolysis by carboxypeptidase-Y and carboxypeptidase-A

The enzymatic hydrolysis of dipeptides by carboxypeptidase-Y and carboxypeptidase-A was investigated. In the enzymatic hydrolysis of the dipeptides, a good linear relationship (r = 0.997 and 0.999) was found between the Michaelis-Menten constant (Km) and the hydrophobicity of the substrates evaluated from relative elution volume in reversed-phase HPLC. The correlation suggests that the hydrophobicity of the C-terminal amino acid is a major factor in governing the stability of the enzyme-substrate complex. The difference in the slope of the linear-regression lines seems to reflect the degree of relative hydrophobicity of the binding pockets in carboxypeptidase-Y and carboxypeptidase-A.

Changes in Conformation and Antimicrobial Properties Caused by Replacement of D-Amino Acids with α-Aminoisobutyric Acid in the Gramicidin Backbone: Synthesis and Circular Dichroic Studies

In an attempt to mimic the stable helical structures of proteins with possible pore-forming ability in membranes, the linear gramicidin backbone has been changed by inserting achiral α-aminoisobutyric acids (Aib) in place of all of the alternatively seque

2-CHLORO-4,6-DISUBSTITUTED-1,3,5,-TRIAZINES A NOVEL GROUP OF CONDENSING REAGENTS

The title compounds form in reaction with carboxylic acids highly reactive intermediates, which are useful as acylating reagents in the preparation of esters, amides, acid anhydrides, and peptides in 64-98 percent yield.