Rev28 - 4 Predict the products of the following reactions N...

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Summary/Review of Chapter 28 1. Draw the structure of Gly-Ala-Phe-Ala, and indicate the preferred conformation of the amide bonds. Which one is the C-terminal, and which is the N-terminal amino acid? 2. What is the definition of isoelectric point? If glycine has an isoelectric point of 5.97, does it have a net negative or net positive charge at pH=7.0 ? 3. Nearly all natural amino acids are called L-amino acids. Draw a Fischer projection of phenylalanine, showing the absolute configuration. Is it "R" or "S"?
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Unformatted text preview: 4. Predict the products of the following reactions: N H H CO 2 H O O (Boc-Phe) + O OC(CH 3 ) 3 NH 2 DCC CF 3 CO 2 H CO 2 H + NHMe DCC N H O CO 2 Et CO 2 Et NaOEt ? PhCH 2 Br H + , H 2 O, heat N O O CO 2 Et CO 2 Et 1. NaOEt 2. PhCH 2 Br 3. H + , H 2 O, heat N H CO 2 CH 2 Ph t-Boc H 2 , Pd/C N H CO 2 C(CH 3 ) 3 C CF 3 CO 2 H 2 , Pd/C CF 3 CO 2 O H 3 C H 3 O +...
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