申请人:Guzaev Andrei P.
公开号:US20110137021A1
公开(公告)日:2011-06-09
The use of N-formamidino-5-amino-3H-1,2,4-dithiazole-3-thiones, 5-phenyl-3H-1,2,4-dithiazole-3-thiones, and derivatives thereof as novel, efficient sulfur-transfer reagents is disclosed. Sulfur transfer from these reagents to compounds containing a P(III) atom (e.g., triphenylphosphine, 5′-O-DMT-thymidine 2-cyanoethyl-(N,N-diisopropyl)phosphoramidite, and 5′-O-DMT-3′-O-levulinyl dithymidilyl 2-cyanoethyl phosphite), was studied in solution by
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P NMR and HPLC. The sulfur transfer from title compounds was also studied in the solid-phase synthesis of oligonucleotide phosphorothioates by phosphoramidite methods. In this application, the efficiency of the sulfur transfer reaction for 2′-deoxyoligonucleotides was better than 99.5%. The novel sulfurizing agents are synthesized, at low cost, using simple chemical methods. As opposed to many sulfur transfer reagents known in the prior art such as 1,2-benzodithiol-3-one-1,1-dioxide (Beaucage reagent) and 5-ethoxy-3H-1,2,4-dithiazole-2-one (EDIT), the sulfurizing agents disclosed herein are highly stable in solution, which increases their practical and commercial value.
本文披露了N-甲酰胺基-5-氨基-3H-1,2,4-二硫代唑-3-硫酮、5-苯基-3H-1,2,4-二硫代唑-3-硫酮及其衍生物作为新型高效的硫转移试剂的用途。从这些试剂向含有P(III)原子的化合物(例如三苯基膦、5′-O-DMT-胸苷2-氰基乙基-(N,N-二异丙基)磷酰胺酯和5′-O-DMT-3′-O-左旋丙酰基二胸苷基2-氰基乙基磷酸酯)进行硫转移的研究,通过31P NMR和HPLC在溶液中进行。此外,还研究了这些化合物的硫转移在磷酰胺酯方法合成寡核苷酸磷硫酸酯的固相合成中的应用。在这个应用中,对于2′-脱氧寡核苷酸,硫转移反应的效率超过99.5%。这些新型硫化剂采用简单的化学方法以低成本合成。与许多已知的硫转移试剂(如1,2-苯并二硫代唑-3-酮-1,1-二氧化物(Beaucage试剂)和5-乙氧基-3H-1,2,4-二硫代唑-2-酮(EDIT))相比,本文披露的硫化试剂在溶液中具有高度稳定性,这提高了它们的实用和商业价值。