title: An improved method for the synthesis and deprotection of methylphosphonate oligonucleotides.
abstract: The methylphosphonate oligonucleotide synthesis methods described here give the desired products in good yield. Superior amounts of product are achieved by modifying both the DNA synthesis program and the reagent to compensate for the unstable methylphosphonite intermediate. Deprotection conditions have also been altered to maximize the recovery of oligonucleotide from DNA synthesis supports and to minimize the amount of base modification. Mass-spectrometry analysis of our oligonucleotides has verified their purity and confirmed the absence of modified bases. When compared to standard DNA synthesis methods, this procedure uses only about one-third the usual amount of monomer. Using these procedures, it should be possible to synthesize reliably methylphosphonate oligonucleotides at 1- and 15-mumol scales.
authors.affiliation: Genta, Inc., San Diego, CA.
authors.forename: R I
authors.initials: RI
authors.lastname: Hogrefe
authors.forename: M A
authors.initials: MA
authors.lastname: Reynolds
authors.forename: M M
authors.initials: MM
authors.lastname: Vaghefi
authors.forename: K M
authors.initials: KM
authors.lastname: Young
authors.forename: T A
authors.initials: TA
authors.lastname: Riley
authors.forename: R E
authors.initials: RE
authors.lastname: Klem
authors.forename: L J
authors.initials: LJ
authors.lastname: Arnold
mesh_terms: D001483:Base Sequence; D001671:Biochemistry / Q000295:instrumentation / Q000379:methods; D002625:Chemistry, Organic / Q000295:instrumentation / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D015195:Drug Design; D008745:Methylation; D008969:Molecular Sequence Data; D009841:Oligonucleotides / Q000138:chemical synthesis* / Q000737:chemistry / Q000302:isolation & purification; D009943:Organophosphorus Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000302:isolation & purification; D010084:Oxidation-Reduction; D011500:Protein Synthesis Inhibitors / Q000138:chemical synthesis
chemical_list: D009841:Oligonucleotides; D009943:Organophosphorus Compounds; D011500:Protein Synthesis Inhibitors