PEPTIDE NUCLEIC ACID DERIVATIVES WITH GOOD CELL PENETRATION AND STRONG AFFINITY FOR NUCLEIC ACID
申请人:Lee Jong-Ook
公开号:US20110178031A1
公开(公告)日:2011-07-21
The present invention provides a novel class of peptide nucleic acid derivatives, which show good cell penetration and strong binding affinity for nucleic acid.
本发明提供了一类新型的肽核酸衍生物,它们具有良好的细胞穿透性和对核酸的强结合亲和力。
Efficient tin-mediated synthesis of lysophospholipid conjugates of a TLR7/8-active imidazoquinoline
作者:Sandra C. Mwakwari、Laura S. Bess、Hélène G. Bazin、David A. Johnson
DOI:10.1016/j.tetlet.2016.03.110
日期:2016.5
The chemical synthesis of lysophospholipids often involves multiple synthetic and chromatographic steps due to the incorporation of the fatty acyl group onto the glycerol scaffold early in the synthesis. We report herein a new protocol for the lysophosphatidylation of alcohols and its application to the synthesis of lysophospholipid conjugates of TLR7/8-active imidazoquinoline 3. This new procedure
Synthesis of (3R,6R)- and (3S,6R)-piperidinone PNA
作者:Ask Püschl、Thomas Boesen、Tullia Tedeschi、Otto Dahl、Peter E. Nielsen
DOI:10.1039/b103901f
日期:——
Two new conformationally restricted piperidinone PNA adenine monomers 12 and 13 have been synthesised using a stereoselective synthesis strategy analogous to a previously published strategy for pyrrolidinone analogues. In contrast to the pyrrolidinone case, epimerisation occurred during the final hydrolysis step. However, the diastereomeric mixture could be separated by RP-HPLC to give small amounts of pure 12 and 13. These were built into a PNA dodecamer (once in a central position), and the thermal stability (Tm) of the modified oligomers hybridised to complementary DNA, RNA and PNA were measured. PNA modified with either 12 or 13 resulted in a decrease of the Tm compared to unmodified PNA and to pyrrolidinone modified PNA. Thus, any preorganisation for duplex formation of PNA with a six-membered piperidinone ring seems to be inferior to preorganisation with a five-membered ring in the pyrrolidinone PNA analogues studied earlier.
Conjugated peptide nucleic acids having enhanced cellular uptake
申请人:ISIS Pharmaceuticals, Inc.
公开号:US20020188101A1
公开(公告)日:2002-12-12
Peptide nucleic acids conjugated to lipophilic groups and incorporated into liposomes exhibit enhanced cellular uptake and distribution. Cellular uptake and distribution of peptide nucleic acids also increases with the introduction of an amino acid side chain into the backbone of peptide nucleic acids. Methods of modulating cellular uptake and methods for treating animals are provided. The peptide nucleic acids of the invention comprise naturally-occurring nucleobases and non-naturally-occurring nucleobases attached to a polyamide backbone.
Novel peptide nucleic acids are disclosed which comprise nucleobases including C-pyrimidines and iso-pyrimidines. Suitable C-pyrimidines include pseudo-isocytosine and pseudo-uracil. Suitable iso-pyrimidine bases include iso-cytosine. Such compositions typically exhibit increased binding affinity.