Download PDF by Andrew B. Hughes: Amino Acids, Peptides and Proteins in Organic Chemistry:

By Andrew B. Hughes

ISBN-10: 3527321039

ISBN-13: 9783527321032

This is the fourth of 5 books within the Amino Acids, Peptides and Proteins in natural Synthesis series. 

Closing a niche within the literature, this can be the single sequence to hide this crucial subject in natural and biochemistry. Drawing upon the mixed services of the foreign "who's who" in amino acid learn, those volumes symbolize a true benchmark for amino acid chemistry, offering a complete dialogue of the prevalence, makes use of and purposes of amino acids and, by means of extension, their polymeric kinds, peptides and proteins.

The functional worth of every quantity is heightened via the inclusion of experimental procedures.

 

The five volumes conceal the subsequent topics:

Volume 1: Origins and Synthesis of Amino Acids

Volume 2: converted Amino Acids, Organocatalysis and Enzymes

Volume three: construction Blocks, Catalysis and Coupling Chemistry

Volume four: security Reactions, Medicinal Chemistry, Combinatorial Synthesis

Volume five: research and serve as of Amino Acids and Peptides

 

The fourth quantity during this sequence is dependent in 3 major sections. the 1st part is set safety reactions and amino acid dependent peptidomimetics. the second one, and so much vast, half is dedicated to the medicinal chemistry of amino acids. It comprises, between others, the chemistry of alpha- and beta amino acids, peptide medicines, and advances in N- and O-glycopeptide synthesis. the ultimate half bargains with amino acids in combinatorial synthesis. equipment, reminiscent of phage show, library peptide synthesis, and computational layout are described.

 

Originally deliberate as a six quantity sequence, Amino Acids, Peptides and Proteins in natural Chemistry now completes with 5 volumes yet continues to be complete in either scope and coverage.

Further information regarding the five quantity Set and buying info will be seen here.

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Read or Download Amino Acids, Peptides and Proteins in Organic Chemistry: Volume 4 - Protection Reactions, Medicinal Chemistry, Combinatorial Synthesis (Amino Acids, Peptides and Proteins in Organic Chemistry (VCH)) PDF

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Additional resources for Amino Acids, Peptides and Proteins in Organic Chemistry: Volume 4 - Protection Reactions, Medicinal Chemistry, Combinatorial Synthesis (Amino Acids, Peptides and Proteins in Organic Chemistry (VCH))

Sample text

2 a-Amino Protection (Na Protection) O O 48 N3 O NHR DTT .. 25 Cleavage of the Z(N3) group via reduction of the azide. cleavage [52–54]. The mechanism of acidolytic cleavage is shifted towards the SN2 pathway by these substituents. The electron-releasing substituents (X ¼ OMe (46) or Me (47)) increase the acid lability of the groups by offering higher resonance stabilization to the benzyl cation formed during cleavage [55, 56]. Deblocking preferentially occurs through an SN1 pathway. In terms of hydrogenolytic cleavage of 43, 45, and 48, a deviation from the standard mode of alkyl-oxygen bond fragmentation is observed.

The bis-Boc derivatives can be transformed to mono Boc derivatives by selective elimination of one Boc moiety by treatment with hydrazine or LiOH or 20% magnesium perchlorate [127]. Under standard conditions of peptide coupling, the activated Na,Na-bis-alkyloxycarbonylamino acids do not racemize via the formation of oxazol-5-one intermediates. However, enolization through base-catalyzed a-proton exchange (leading to racemization) can be promoted by the presence of an additional electron-withdrawing substituent on the a-amino group.

22) or in the presence of tertiary amines in organic solvents [41]. Z-Cl is commercially available and can also be prepared by the treatment of benzyl alcohol with phosgene (caution: phosgene is a highly poisonous gas and should be handled with extreme caution). However, the formation of Z-protected dipeptides as sideproducts and acylation of the hydroxy group of Ser and Thr and the phenolic function of Tyr (Z-Tyr-OH is obtained by alkaline hydrolysis of the corresponding bis-Z derivative) are the disadvantages of this highly active reagent.

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Amino Acids, Peptides and Proteins in Organic Chemistry: Volume 4 - Protection Reactions, Medicinal Chemistry, Combinatorial Synthesis (Amino Acids, Peptides and Proteins in Organic Chemistry (VCH)) by Andrew B. Hughes


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