Convenient and Scalable Synthesis of Fmoc-Protected Peptide Nucleic Acid Backbone
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چکیده
منابع مشابه
Convenient and Scalable Synthesis of Fmoc-Protected Peptide Nucleic Acid Backbone
The peptide nucleic acid backbone Fmoc-AEG-OBn has been synthesized via a scalable and cost-effective route. Ethylenediamine is mono-Boc protected, then alkylated with benzyl bromoacetate. The Boc group is removed and replaced with an Fmoc group. The synthesis was performed starting with 50 g of Boc anhydride to give 31 g of product in 32% overall yield. The Fmoc-protected PNA backbone is a key...
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The highly α-selective and scalable synthesis of the Fmoc-protected GalNAc-threonine amino acid and TN antigen in gram scale (0.5-1 g) is described. The challenging 1,2-cis-2-amino glycosidic bond is addressed through a coupling of threonine residues with C(2)-N-ortho-(trifluoromethyl)benzylidenamino trihaloacetimidate donors mediated by Ni(4-F-PhCN)4(OTf)2. The desired 1,2-cis-2-amino glycosid...
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Fmoc-protected trans-4-methylproline was synthesized starting from D-serine. The chiral scaffold of serine in the form of olefinated Garner's aldehyde 3 was used to control the diastereoselective formation of the new stereocenter on the hydrogenation of allylic alcohol 4. The diastereoselectivity (syn/anti ratio) of the process was 86:14, attained with Raney nickel. Hydrogen migration seems not...
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In general, a solid-phase peptide synthesis (SPPS) consists of the assembly of a protected peptide chain on a polymeric support (=synthetic step) and the subsequent cleavage/deprotection to release the crude, deprotected peptide from the solid support (=cleavage step). Usually, these two steps are followed by chromatographic purification of the crude peptide (see Chapters 1,2,4, and 5, PAP). Th...
متن کاملA straightforward synthesis of 5'-peptide oligonucleotide conjugates using N(alpha)-Fmoc-protected amino acids.
[reaction: see text] 5'-Peptide oligonucleotide conjugates were prepared stepwise on a single support using N(alpha)-Fmoc-protected amino acids and unprotected phosphate groups. The method uses commercially available reagents and is successful with most natural amino acids. The simplicity of the method may encourage researchers to prepare new oligonucleotide-peptide conjugates with novel proper...
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ژورنال
عنوان ژورنال: Journal of Nucleic Acids
سال: 2012
ISSN: 2090-0201,2090-021X
DOI: 10.1155/2012/354549