Concept explainers
(a)
Interpretation:
The synthesis of the standard amino acid from the given starting material is to be stated.
Concept introduction:
The compounds that contain an
(b)
Interpretation:
The synthesis of the standard amino acid from the given starting material is to be stated.
Concept introduction:
The compounds that contain an amine group and a carboxyl group attached with a side chain usually alkyl or aromatic chains are known as amino acids. These compounds are used as structural units to make proteins. Amino acids are joined together with a peptide bond to form proteins.
(c)
Interpretation:
The synthesis of the standard amino acid from the given starting material is to be stated.
Concept introduction:
The compounds that contain an amine group and a carboxyl group attached with a side chain usually alkyl or aromatic chains are known as amino acids. These compounds are used as structural units to make proteins. Amino acids are joined together with a peptide bond to form proteins.
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Organic Chemistry (9th Edition)
- Leuprolide is a synthetic nonapeptide used to treat both endometriosis in women and prostate cancer in men. (a) Both C-terminal and N-terminal amino acids in leuprolide have been structurally modified. Identify the modifications. (b) One of the nine amino acids in leuprolide has d stereochemistry rather than the usual L. Which one? (c) Write the structure of leuprolide using both one- and three-letter abbreviations. (d) What charge would you expect leuprolide to have at neutral pH?arrow_forwardA tripeptide on hydrolysis produced glycine, alanine and leucine. The structures of these amino acids are shown below. On reaction with Edman’s reagent, leucine was released as the phenylhydantoin. Treatment of the tripeptide with carboxypeptidase gave glycine. Draw the structure of the tripeptide.arrow_forwardProvide the product and determine L or D amino acidarrow_forward
- The aminolysis of acetic anhydride will produce aniline and ammonia as major products. True or Falsearrow_forwardA is a key intermediate in an enzyme mediated reaction. A immediately reacts further to give B and C. Provide mechanisms to explain the formation of B and C. The reaction takes place in H2O (solvent).arrow_forwardAccording to the paper, F486 is a phenylalanine residue (i.e., an amino acid that is part of a chain that forms a protein) on SARS-CoV-2. It has an important interaction with ACE2 (best seen in Fig. 1(C) and Fig. 2(A)). Looking at this phenylalanine and the green residues surrounding it, which statement best describes the interaction that could be occurring? a) It forms a hydrogen bond with Y83. b) It forms a dipole-dipole interaction with M82. c) It forms London dispersion forces with surrounding residues. d) It encounters repulsions from surrounding residues.arrow_forward
- provide the structure for the product followin gthe reaction sequencearrow_forwardProtein: SHAYNERSE Predict the products of the following reactions with the protein given, if there is none, write NO RXN. - Biuret reagent - KOH/Pb(CH2COO)2 - Glyoxilic Acid/Conc. H2SO - Hg/HNO3 - HNO3arrow_forwardHow do you synthesize the amino acid Phenylalanine from benzaldehyde as the starting compound? >please write out all the steps and reagents involvedarrow_forward
- The Wohl degradation, an alternative to the Ruff degradation, is nearly the reverse ofthe Kiliani–Fischer synthesis. The aldose carbonyl group is converted to the oxime,which is dehydrated by acetic anhydride to the nitrile (a cyanohydrin). Cyanohydrinformation is reversible, and a basic hydrolysis allows the cyanohydrin to loseHCN. Using the following sequence of reagents, give equations for the individualreactions in the Wohl degradation of d-arabinose to d-erythrose. Mechanisms arenot required.(1) hydroxylamine hydrochloride (2) acetic anhydride (3) -OH, H2Oarrow_forwardFor this reaction, a histidine amino acid residue acts as the general base while a lysine amino acid residue acts as the general acid. Draw the arrow-pushing mechanism for this reaction and make sure to include both amino acid residues mentioned above in your mechanism along with their protonation state.arrow_forward-Amino acids can be prepared by the Strecker synthesis, a two-step process in which an aldehyde is treated with ammonium cyanide followed by hydrolysis of the amino nitrile intermediate with aqueous acid. Propose a mechanism for the reaction.arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT