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Unformatted text preview: 3 ONa 2. H 3 O + workup (mild conditions) a b ANSWER: _____ OEt O EtO OEt O O + EtO O OEt O O EtO O O EtO O OEt O O OEt O O OEt HO O OH O HO O O c d e f a. The pI of valine is lower than that of lysine. b. Raul protected valine with Boc, Cbz, or a similar group c. Raul prepared the dipeptide val-lys. d. Both amino acids have R configurations at their ! carbons. e. DCC activated the carboxyl group of an appropriately protected lysine. f. The amino acids above are illustrated as they would exist at pH = 1.0. ANSWERS: _____ _____ Mystery Depeptide H 3 N O O valine val H 3 N O O lysine lys H 3 N 1. protection reactions 2. DCC coupling 3. deprotection reactions and...
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