Nucleoside phosphoramidites and H-phosphonate diesters can be converted to nucleosides under mild conditions and in high yields by reaction with polyhydroxy alcohols. (C) 1999 Elsevier Science Ltd. All rights reserved.
2-Benzamidoethyl Group − A Novel Type of Phosphate Protecting Group for Oligonucleotide Synthesis
作者:Andrei P. Guzaev、Muthiah Manoharan
DOI:10.1021/ja0016396
日期:2001.2.1
2-(N-benzoylamino)ethyl group (A-C) were the most stable. For the most reactive group, H, a phosphitylatingreagent, bisamidite 60, was synthesized and used in the preparation of four deoxynucleoside phosphoramidites 28 and 65-67, plus the 2'-O-(2-methoxyethyl)-5-methyluridine phosphoramidite 68. All of these novel building blocks were successfully tested in the preparation of natural, 20-mer oligonucleotides
4-Cyano-2-butenyl group: A new type of protecting group in oligonucleotide synthesis via phosphoramidite approach
作者:Vasulinga T. Ravikumar、Zacharia S. Cheruvallath、Douglas L. Cole
DOI:10.1016/s0040-4039(96)01496-7
日期:1996.9
4-Cyano-2-butenyl (CB) is a new type of protectinggroup for the internucleotidic bonds in the synthesis of oligodeoxyribonucleotides by the phosphoramidite approach. This group is stable to acidic conditions and can be removed under mild conditions by a δ-elimination pathway using aqueous ammonium hydroxide.
Chemoselective Activation of Nucleoside 3‘-<i>O</i>-Methylphosphonothioates with 1,3,5-Triazinyl Morpholinium Salts
作者:Lucyna A. Wozniak、Marcin Góra、Wojciech J. Stec
DOI:10.1021/jo7014906
日期:2007.10.1
Chemoselective and stereospecific O-activation of 2‘-deoxynucleoside 3‘-O-methylphosphonothioates 5 with N-methyl-N-4,6-dimethoxy-1,3,5-triazin-2-yl morpholinium salts results in formation with retention of configuration of 5‘-O-DMT-2‘-deoxynucleoside 3‘-O-(4,6 dimethoxy-1,3,5-triazin-2-yl methylphosphonothioates (7). Active esters 7 are convenient intermediates for hydrolytic interconversion of RP-5
化学选择性和立体ö -activation的2'-脱氧核苷3'- ö -methylphosphonothioates 5与Ñ甲基Ñ -4,6-二甲氧基-1,3,5-三嗪-2-基吗啉盐导致形成与保持5'- O -DMT-2'-脱氧核苷3'- O-(4,6二甲氧基-1,3,5-三嗪-2-基甲基硫代磷酸酯(7)的构型。活性酯7是水解中间体相互转化的便利中间体R P - 5到S P - 5 可用作立体选择性合成二核苷(3',5')-甲基硫代磷酸酯的单体。
One-Pot Synthesis of Dinucleoside (3′,5′)-Methylphosphonothioates and their Seleno Congeners via the Phosphonotriazolidite Approach
An efficient method for large laboratory scale synthesis of dinucleoside (3',5')-methylphosphonothioates and their methylphosphonoselenoate congeners is presented. Bis-(1,2,4-triazoloyl)methylphosphonite generated in situ from methyldichlorophosphine is used as a phosphitylating agent and the preparations are performed as one-pot-reactions without isolation of the reactive PIII intermediates.
Synthesis of alkylphosphon(othio)ate analogues of DNA
作者:J.C.P.F Roelen、H van den Elst、C.E Dreef、G.A van der Marel、J.H van Boom
DOI:10.1016/s0040-4039(00)74210-9
日期:1992.4
Easily accessible bis(diisopropylamino)alkylphosphines (alkyl is methyl, n-butyl or n-octyl) are convenientreagents for the synthesis of DNAfragments having an alkylphosphonate or alkylphosphonothioate linkage at a predetermined site in solution and on solid support.