Paulina Juszczyk, Regina Kasprzykowska, Aleksandra S. Kołodziejczyk
Sodium bis(2-methoxyethoxy)aluminum hydride, NaAlH2(OCH2CH2OCH3)2, commercially
known as Vitride® or Red-Al®, enables rapid synthesis of pure optically active
N-protected amino alcohols and peptide alcohols in very high yields. The method
is very simple and attractive, as it does not require an additional step of
N-protected amino acid derivatization and proceeds without the loss of
enantiomeric h... hiện toàn bộ
The coupling of urethane protected amino acidfluorides is accomplished in the
presence ofactivated, commercial zinc dust to synthesize severaldi- and
tripeptides.The coupling was fast and racemization free. The yieldas well as
purity of the peptides was satisfactory.The method was extended for the
incorporation ofsterically hindered α,α-dialkylaminoacids and N-methylamino
acids as well.
Carrie Haskell-Luevano, Lakmal W. Boteju, Victor J. Hruby
Nitrogen indole protection of the β-methyltryptophan side-chain residue is
important for avoiding undesired side reactions during peptide synthesis. Of
great importance is the choice of a side-chain protecting group for orthogonal
peptide synthesis and its stability under a variety of chemical conditions
required for synthesis of the four isomers of this unusual amino acid. We report
here the succ... hiện toàn bộ
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