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    • 64. 发明授权
    • Sulfur transfer reagents for oligonucleotide synthesis
    • 用于寡核苷酸合成的硫转移试剂
    • US6096881A
    • 2000-08-01
    • US865666
    • 1997-05-30
    • Yongxin HanJimmy TangZhoada ZhangJin-Yan Tang
    • Yongxin HanJimmy TangZhoada ZhangJin-Yan Tang
    • C07D285/12C07D285/125C07D285/135C07D285/16C07H21/00C07D285/01C07H21/02
    • C07D285/16C07H21/00
    • In our research, two commercially available compounds, 3-amino-1,2,4-dithiazole-5-thione (1) and xanthane hydride (2), and their derivatives 3-6 are found to be potential sulfur-transfer reagents. The efficiency and optimization of these new sulfur-transfer reagents were investigated by solid-phase syntheses of dinudeotide and oligonucleotide phosphorothioates. The results show that both compounds 1 and 2 are highly efficient sulfurizing reagents, and better than 99% sulfur transfer efficiency can be achieved at each step. In contrast to Beaucage reagent, these novel sulfur-transfer reagents are very stable in various solvents, and are available in bulk quantities at low cost. Due to these advantages, compounds 1 and 2 can be considered alternatives to Beaucage reagent, especially in large-scale preparation of oligonucleotide phosphorothioates. Furthermore, compounds 1 and 2 were modified to enhance their solubility in acetonitrile. Three types of structure, as described as Formulae I, II, and III, are considered as potential efficient sulfur-transfer reagents based on our results.
    • 在我们的研究中,发现两种市售化合物,3-氨基-1,2,4-二噻唑-5-硫酮(1)和氢化蒽(2)及其衍生物3-6是潜在的硫转移试剂。 通过二肽和寡核苷酸硫代磷酸酯的固相合成研究了这些新型硫转移试剂的效率和优化。 结果表明,化合物1和化合物2均为高效硫化试剂,每步可达99%以上的硫转移效率。 与Beaucage试剂相反,这些新型硫转移试剂在各种溶剂中非常稳定,并且可以以低成本批量获得。 由于这些优点,化合物1和2可以被认为是拜耳试剂的替代物,特别是在大规模制备寡核苷酸硫代磷酸酯时。 此外,化合物1和2被修饰以增强其在乙腈中的溶解度。 根据我们的结果,三种类型的结构,如式I,II和III所述被认为是潜在的有效的硫转移试剂。