Dipeptide Report

  1. Introduction
    1. Discuss the purpose for protecting group strategy and activation of carboxyl group in this experiment. Include schemes for all reactions performed.
    2. Why the starting amino acid exists as a Zwitterion? Explain?

Why does the final product of part I is not a Zwitterion? Explain?

  1. Results and Discussion
    1. Reaction II: Coupling of N-acetyl phenylalanine.
      1. Determine on the purity achieved in each step by analyzing the crude and pure NMR spectra – by interpreting all signals, including integrations and assigning to structures – and compare with the spectra of the pure product.
      2. Discuss the mechanism by which the peptide was formed by using TBTU
  • Determine if racemization is present in crude product and discuss how the stereoisomers could have formed by proposing a reasonable mechanism of this racemization.

 

  1. Introduction
    1. Discuss the purpose for protecting group strategy and activation of carboxyl group in this experiment. Include schemes for all reactions performed.
    2. Why the starting amino acid exists as a Zwitterion? Explain?

Why does the final product of part I is not a Zwitterion? Explain?

  1. Results and Discussion
    1. Reaction II: Coupling of N-acetyl phenylalanine.
      1. Determine on the purity achieved in each step by analyzing the crude and pure NMR spectra – by interpreting all signals, including integrations and assigning to structures – and compare with the spectra of the pure product.
      2. Discuss the mechanism by which the peptide was formed by using TBTU
  • Determine if racemization is present in crude product and discuss how the stereoisomers could have formed by proposing a reasonable mechanism of this racemization.

 

 

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