Ikehara M, Tezuka T. Polynucleotides. XXXII. Further studies on the synthesis of oligonucleotides containing 8,2'-S-cycloadenosine.
Nucleic Acids Res 1975;
2:1539-50. [PMID:
170595 PMCID:
PMC343521 DOI:
10.1093/nar/2.9.1539]
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Abstract
A dinucleoside monophosphate, 8,2'-anhydro-8-mercapto-9-beta-D-arabinofuranosyladenine phosphoryl-(3'-5')-inosine (AspI) was synthesized by the condensation of protected 8-mercapto-adenosine 2',3'-cyclic phosphate and 2',3'-isopropylideneinosine with diphenylphosphorochloridate. 8-Mercaptoadenosine 2',3'-cyclic phosphate was polymerized by using tetraphenyl pyrophosphate as the condensing reagent. As oligonucleotides, thus obtained, contained some uncyclized 8-mercaptoadenosine residues and were cleaved at these sites with 0.3N KOH. As 5'-phosphate was synthesized and polymerized with DCC to give oligonucleotides with chain lengths 2 to 9.
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