(S,S)-trans-Cyclopentane-Constrained Peptide Nucleic Acids. A General Backbone Modification that Improves Binding Affinity and Sequence Specificity
摘要:
Replacing the ethylenediamine portion of aminoethylglycine peptide nucleic acids (aegPNAs) with one or more (S,S)-trans-cyclopentane diamine units significantly increases binding affinity and sequence specificity to complementary DNA, making these modified PNAs ideal for use as nucleic acid probes in genomic analysis. The synthesis and study of this new class of PNAs (tcypPNAs) is described in which trans-cyclopentane diamine has been incorporated into several positions, and in varying number, within PNA backbones of mixed-base sequences.
Optimized stereoselective and scalable synthesis of five‐membered cyclic <i>trans</i>‐β‐amino acid building blocks via reductive amination
作者:Jungwoo Hong、Wonchul Lee、Hee‐Seung Lee
DOI:10.1002/bkcs.12786
日期:2023.12
We present an optimized method for the stereoselective synthesis of five-membered alicyclic and heterocyclic trans-β-amino acidderivatives. The process involves a reductive amination of β-keto esters using chiral auxiliary amines, with formic acid acting as a facilitator for rapid, diastereoselective reductions under gentle conditions. Our approach notably enhances isolated yields and permits the