The preparation of building blocks for the incorporation of 6'-0-(5-bromopentyl)-substituted beta-D-allofuranosylnucleosides and 2'-O-[(3-bromopropoxy)methyl]-substituted ribonucleosides into oligonucleotide sequences is presented (Schemes 1 and 2). These reactive building blocks can be modified with a variety of soft nucleophiles while the (fully protected) sequence is still attached to the solid support. As an example of this strategy, we carried out some preliminary solid-phase substitution and conjugation reactions with DNA sequences containing a 2'-O-[(3-bromopropoxy)methyl]-substituted ribonucleoside (Scheme 3) and determined the pairing properties of duplexes obtained therefrom.
Method for synthesizing spiro quartenary ammonium systems
申请人:Siggel Alfred
公开号:US20070049750A1
公开(公告)日:2007-03-01
A method for preparing a spiro quaternary ammonium system and electrolytes containing spiro quaternary ammonium cations, comprising a synthesizing step wherein a spiro ammonium system is formed in a medium that can serve as both the reaction solvent and as an electrolyte solvent.
This invention relates to 11,12-secoprostaglandins and processes for their manufacture. These compounds have prostaglandin-like biological activity and are particularly useful as renal vasodilators, for the treatment of hypertension, for the prevention of thrombus formation, in preventing gastric secretion, and as regulators of the immune response.
Phosphoramidite building blocks for efficient incorporation of 2′-O-aminoethoxy(and propoxy)methyl nucleosides into oligonucleotides
作者:Georgii V. Bobkov、Sergey N. Mikhailov、Arthur Van Aerschot、Piet Herdewijn
DOI:10.1016/j.tet.2008.04.110
日期:2008.6
A simple and efficient method for the preparation of eight phosphoramidite buildingblocks for incorporation of 2′-O-(2-aminoethoxymethyl)ribonucleosides and 2′-O-(3-aminopropoxymethyl)ribonucleosides into synthetic oligonucleotides has been developed. The synthetic routes are maximally convergent and provide sufficient amounts of phosphoramidites for several solid-phase synthesis coupling reactions
Acyclic purine phosphonate analogs as antiviral agents. Synthesis and structure-activity relationships
作者:Choung Un Kim、Bing Yu Luh、Peter F. Misco、Joanne J. Bronson、Michael J. M. Hitchcock、Ismail Ghazzouli、John C. Martin
DOI:10.1021/jm00166a019
日期:1990.4
observed by the bovine brain guanylate kinase. Since all isosteric analogues of PMEG (7-9) were not inhibitory against HSV-1 and HSV-2, the presence of the 3'-oxygen atom in the PME purines proved critical for anti-HSV activity. Introduction of the 1'-methyl group on the PMEG side chain significantly reduced its anti-HSV activity. Analogue 11, which is a mimic of the phosphate by incorporation of the alpha