HYCRON, an Allylic Anchor for High-Efficiency Solid Phase Synthesis of Protected Peptides and Glycopeptides
摘要:
The recently developed allylic HYCRON anchor(1) exhibits excellent properties for the solid phase synthesis of protected peptides and glycopeptides. Model reactions with analogous low molecular weight compounds assessed the acid- and base-stability of the polar and flexible HYCRON linkage. The new anchor is available in a two-step synthesis and allows the use of both the Boc- and the Fmoc-strategy, which can even be combined within one synthesis. Protected glycopeptides are released under almost neutral conditions, taking advantage of the Pd(O)-catalyzed allyl transfer to a weakly basic nucleophile such as N-methylaniline. The highly efficient synthesis of O-alpha GalNAc-(T-N)-peptides of the MUC-1 repeating unit is described. Acid- and base-stability of the allyl ester linkage enabled the synthesis of an O-glucosylated peptide by first removing a threonine tert-butyl group on the solid phase and subsequently glycosylating the liberated resin-bound hydroxyl component.
HYCRON, an Allylic Anchor for High-Efficiency Solid Phase Synthesis of Protected Peptides and Glycopeptides
摘要:
The recently developed allylic HYCRON anchor(1) exhibits excellent properties for the solid phase synthesis of protected peptides and glycopeptides. Model reactions with analogous low molecular weight compounds assessed the acid- and base-stability of the polar and flexible HYCRON linkage. The new anchor is available in a two-step synthesis and allows the use of both the Boc- and the Fmoc-strategy, which can even be combined within one synthesis. Protected glycopeptides are released under almost neutral conditions, taking advantage of the Pd(O)-catalyzed allyl transfer to a weakly basic nucleophile such as N-methylaniline. The highly efficient synthesis of O-alpha GalNAc-(T-N)-peptides of the MUC-1 repeating unit is described. Acid- and base-stability of the allyl ester linkage enabled the synthesis of an O-glucosylated peptide by first removing a threonine tert-butyl group on the solid phase and subsequently glycosylating the liberated resin-bound hydroxyl component.
The site-selective conjugation of peptide nucleicacids (PNA) with fluorescent reporter groups is essential for the construction of hybridisation probes that can report the presence of a particular DNA sequence. This paper describes convergent methods for the solution- and solid-phase synthesis of multiply labelled PNA oligomers. The solid-phase synthesis of protected PNA enabled the selective attachment
Coupling of nonnatural nucleobases to the orthogonally protected backbone 1 on the solid phase provided access to novel peptide nucleic acid (PNA) conjugates 2, which are difficult to synthesize by standard routes. Hybridization probes containing the thiazolorange dye might allow DNA sequence analysis in real time. B-CH(2)CO=modified nucleobase, fluorescent dye, etc; Boc, Fmoc=protecting groups.
HYCRON, an Allylic Anchor for High-Efficiency Solid Phase Synthesis of Protected Peptides and Glycopeptides
作者:Oliver Seitz、Horst Kunz
DOI:10.1021/jo960743w
日期:1997.2.1
The recently developed allylic HYCRON anchor(1) exhibits excellent properties for the solid phase synthesis of protected peptides and glycopeptides. Model reactions with analogous low molecular weight compounds assessed the acid- and base-stability of the polar and flexible HYCRON linkage. The new anchor is available in a two-step synthesis and allows the use of both the Boc- and the Fmoc-strategy, which can even be combined within one synthesis. Protected glycopeptides are released under almost neutral conditions, taking advantage of the Pd(O)-catalyzed allyl transfer to a weakly basic nucleophile such as N-methylaniline. The highly efficient synthesis of O-alpha GalNAc-(T-N)-peptides of the MUC-1 repeating unit is described. Acid- and base-stability of the allyl ester linkage enabled the synthesis of an O-glucosylated peptide by first removing a threonine tert-butyl group on the solid phase and subsequently glycosylating the liberated resin-bound hydroxyl component.