Liquid-phase synthesis of polyamide nucleic acids (PNA)
摘要:
Three liquid-phase processes for the elaboration of short orthogonally protected PNA have been devised. Two of these methods are similar to the convergent and divergent approaches in peptide synthesis. The third process consists in building a fully protected polyamide backbone, by using as many different and orthogonal protecting groups as there are different types of nucleic bases in the targeted polyPNA. Simultaneous and selective cleavage of one kind of protecting group allows the simultaneous attachment of several identical nucleobase units. (C) 1999 Elsevier Science Ltd. All rights reserved.
Liquid-phase synthesis of a cyclic hexameric peptide nucleic acid
作者:Geoffrey Depecker、Caroline Schwergold、Christophe Di Giorgio、Nadia Patino、Roger Condom
DOI:10.1016/s0040-4039(01)01776-2
日期:2001.11
A cyclic fully N-protected hexameric (aminoethylglycinamide) can be readily obtained by using a divergent approach in liquid phase and consists of coupling orthogonal fragments of suitable oligomers. This cyclic N-protected backbone is then converted into a peptide nucleic acid by a series of selective deprotection–coupling steps affording the desired structure in good overall yields. Such a procedure
The ‘fully protected backbone’ approach as a versatile tool for a new solid-phase PNA synthesis strategy
作者:Gregory Upert、Mohamed Mehiri、Mary-Lorène Goddard、Audrey Di Giorgio、Rachid Benhida、Roger Condom、Nadia Patino
DOI:10.1016/j.tetlet.2005.04.018
日期:2005.6
The ‘fully protected backbone’ (FPB) strategy has been efficiently adapted to the solid-phasesynthesis of homothymine, homocytosine and ‘mixed’ pyrimidine PNAs. This versatile and simple method avoids the preparation of PNA monomers and relies on easy available starting materials, highly efficient backbone elongations and effective nucleobase units condensations.