861230-75-3

Upstream product

• 601512-74-7 1-[2-O-acetyl-3-O-benzyl-5-O-(methylsulfonyl)-4-C-(methylsulfonyloxymethyl)-α-L-threo-pentofuranosyl]thymine 
• 65-71-4 thymin 
• 410076-93-6 3-O-benzyl-1,2-di-O-acetyl-5-O-(methylsulfonyl)-4-C-(methylsulfonyloxymethyl)-α,β-L-threo-pentofuranose 
• 296253-28-6 1-[3-O-benzyl-2,5-di-O-(methylsulfonyl)-4-C-(methylsulfonyloxymethyl)-α-L-threo-pentofuranosyl]thymine 

Downstream Products

• 245366-55-6 (1R,3R,4R,7R)-1-[(4,4'-dimethoxytrityl)oxymethyl]-7-hydroxy-3-(thymin-1-yl)-2,5-dioxabicyclo[2.2.1]heptane 

Relevant academic research and scientific papers

XNA ?(xylo nucleic acid): A summary and new derivatives

Fully modified homopyrimidine 2′-deoxy-xylo nucleic acid (dXNA) form triple helixes with complementary DNA/RNA with thermal stabilities comparable to those of the corresponding DNA:DNA and DNA:RNA duplexes. However, a single or few insertions of dXNA monomers in a DNA strand significantly lower duplex stabilities. The dXNA monomers are known to adopt predominantly an N-type furanose conformation in solution. With a desire to increase the binding affinity, seven sugar-modified XNA monomers (H, F, N, M, K, P and Q) have been synthesised and their effect on hybridization towards DNA and RNA complements studied. The introduction of 2′-fluoro and 2′-hydroxy substituents was expected to induce conformational restriction towards C3′-endo-type furanose conformation of monomer F derived from 1-(2′-deoxy-2′-fluoro-β-D-xylofuranosyl)thymine and monomer H derived from 1-(β-D-xylofuranosyl)thymine. The presence of functionalites facing the minor groove as in 1-(2′-amino-2′-deoxy-2′-N, 4′-C-methylene-β-D-xylofuranosyl)thymine (monomer N), 1-[4-C-(N-methylpiperazinyl)methyl-β-D-xylofuranosyl]thymine (monomer P), 1-(4-C-piperazinylmethyl-β-D-xylofuranosyl)thymine (monomer Q), 1-(4-C-hydroxymethyl-β-D-xylofuranosyl)thymine (monomer M) and 9-(4-C-hydroxymethyl-β-D-xylofuranosyl)adenine (monomer K) was studied, with monomer N being locked in an N-type furanose conformation. Besides, an efficient synthesis of known xylo-LNA phosphoramidite 19, required for the incorporation of 1-(2′-O,4′-C-methylene-β-D-xylofuranosyl)thymine (monomer L) is described. For comparison, hydridization data of various XNAs reported in the literature are included in the discussion section. The thermal denaturation studies show that XNAs containing conformationally locked monomers (N and L) display improved binding affinity, and that partially modified DNA/XNA chimera, or fully modified XNA display preferential hybridization towards RNA complements. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005.

L-Ribo-LNA analogues

Provided are L-ribo bicyclic nucleotide compounds as well as syntheses of such compounds The nucleoside compounds of the invention are useful in forming oligonucleotides that can produce nucleobase specific duplexes with complementary single stranded and