Chapter 29: Q40P (page 1193)
What alkyl halide is needed to synthesize each amino acid from diethyl acetamidomalonate: (a)Asn; (b)His; (c)Trp?
Chapter 29: Q40P (page 1193)
What alkyl halide is needed to synthesize each amino acid from diethyl acetamidomalonate: (a)Asn; (b)His; (c)Trp?
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Get started for freeWhat is the predominant form of each of the following amino acids at pH=11? What is the overall charge on the amino acid? (a)valine; (b)proline; (c)glutamic acid; (d)lysine?
a. Draw the structure of the tripeptide A-A-A, and label the two ionizable functional groups.
b. What is the predominant form of A-A-A at pH=1?
c. The values for the two ionizable functional groups (3.39 and 8.03) differ considerably from the values of alanine (2.35 and 9.87;see table 29.1). Account for the observed differences.
Draw the other three stereoisomers of L-isoleucine, and label the stereogenic centers as R or S.
Devise a synthesis of each peptide from amino acid starting materials:
(a) LeuโVal; (b) AlaโIleโGly.
Write out a scheme for the resolution of the two enantiomers of the antiplatelet drug clopidogrel with 10-camphorsulfonic acid.
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