Abstract:
The present invention provides a method for preparing nucleotide oligomers, including (a) coupling a nucleotide dimer or nucleotide trimer to a nucleoside attached to solid supports or to universal solid supports as a starting material; (b) sequentially coupling nucleotide monomers to the resulting structures of Step (a) to prepare a nucleotide oligomer; and (c) removing the nucleotide oligomers from the solid supports.The method of the present invention provides nucleotide oligomers having 15-20% higher purity than the conventional art. The present invention enables the efficient and inexpensive synthesis of nucleotide oligomers with high purity within a shorter period of time.
Abstract:
A method of preparing 2-deoxy-L-ribose represented by the following formula I is disclosed. The preparation method includes the steps of: treating L-arabinose with an alcohol solvent in the presence of an acid to prepare 1-alkoxy-L-arabinopyranose; allowing the prepared 1-alkoxy-L-arabinopyranose to react with acyl chloride so as to prepare 1-alkoxy-2,3,4-triacyl-L-arabinopyranose; brominating the alkoxy group of the prepared 1-alkoxy-2,3,4-triacyl-L-arabinopyranose to prepare a 1-bromo-2,3,4-triacyl compound; allowing the prepared compound to react with zinc in the presence of ethyl acetate and an organic base so as to prepare glycal; treating the glycal with an alcohol solvent in the presence of an acid to prepare 1-alkoxy-2-deoxy-3,4-diacyl-L-ribopyranose; treating the prepared 1-alkoxy-2-deoxy-3,4-diacyl-L-ribopyranose with a base to prepare 1-alkoxy-2-deoxy-L-ribopyranose; and hydrolyzing the prepared 1-alkoxy-2-deoxy-L-ribopyranose in the presence of an acid catalyst.
Abstract:
The present invention relates to an economic synthetic method of 2-deoxy-L-ribose with easy reaction, separation and purification. The present invention consists of four (4) steps including protection, activation of 3- and 4-OH groups, inversion and deprotection steps. In respect to the cost for equipment, reagent and operation, by the present invention, 2-deoxy-L-ribose can be produced more economically because the invention uses 2-deoxy-L-ribose which is abundant in nature and easily synthesized from D-glucose and adopt simple and yielding process.
Abstract:
Disclosed therein is a method for preparing the 3′-amino-2′,3′-dideoxyguanosine, comprising the steps of: (a) treating 3′-amino-3′-deoxythymidine and 2,6-diaminopurine with a pyrimidine nucleoside phosphorylase and a purine nucleoside phosphorylase to prepare 3′-amino-2′,3′-dideoxyribosyl 2,6-diaminopurine; and (b) converting enzymatically the 3′-amino-2′,3′-dideoxyribosyl 2,6-diaminopurine with an adenosine deaminase to prepare 3′-amino-2′,3′-dideoxyguanosine. According to the present invention, 3′-amino-2′,3′-dideoxyguanosine may be obtained with very high yield in a relatively simple procedure.
Abstract:
A method of preparing 2-deoxy-L-ribose represented by the following formula I is disclosed. The preparation method includes the steps of: treating L-arabinose with an alcohol solvent in the presence of an acid to prepare 1-alkoxy-L-arabinopyranose; allowing the prepared 1-alkoxy-L-arabinopyranose to react with acyl chloride so as to prepare 1-alkoxy-2,3,4-triacyl-L-arabinopyranose; brominating the alkoxy group of the prepared 1-alkoxy-2,3,4-triacyl-L-arabinopyranose to prepare a 1-bromo-2,3,4-triacyl compound; allowing the prepared compound to react with zinc in the presence of ethyl acetate and an organic base so as to prepare glycal; treating the glycal with an alcohol solvent in the presence of an acid to prepare 1-alkoxy-2-deoxy-3,4-diacyl-L-ribopyranose; treating the prepared 1-alkoxy-2-deoxy-3,4-diacyl-L-ribopyranose with a base to prepare 1-alkoxy-2-deoxy-L-ribopyranose; and hydrolyzing the prepared 1-alkoxy-2-deoxy-L-ribopyranose in the presence of an acid catalyst.
Abstract:
The present invention relates to new aziridine derivative that is represented by following general chemical formulae (la) or (lb), and to their preparation method. In the above mentioned chemical formulae, R2 and R3 can be same or different, and they are hydrogen, low-quality alkyl or cycloalkyl respectively; R4 can be selected among hydrogen, alkyl, aril, or amino protective group, and amino protective group is, for example, (PH)3C, FMOC (9-fluorenylmethyl oxycarbonyl), alkoxycarbonyl, ariloxycarbonyl, aralkyloxycarbonyl and R5CO, R5SO2 where R5 is alkyl or aril or aralkyl.
Abstract translation:本发明涉及由以下一般化学式(Ia)或(Ib)表示的新的氮丙啶衍生物及其制备方法。 在上述化学式中,R 2和R 3可以相同或不同,它们分别是氢,低质量烷基或环烷基; R 4可以选自氢,烷基,芳基或氨基保护基,氨基保护基是例如(PH)3 C,FMOC(9- 芴基甲基氧羰基),烷氧基羰基,芳氧基羰基,芳烷氧基羰基和R 5 CO,R 5 SO 2,其中R 5是 烷基或芳基或芳烷基。
Abstract:
The present invention relates to a new aziridine derivative that is represented herein by general chemical formulae (Ia) or (Ib), and to their preparation method. In the said chemical formulae, R2 and R3 can be the same or different, and they are hydrogen, low-quality alkyl or cycloalkyl respectively; R4 can be selected among hydrogen, alkyl, aryl, or amino protective group; and amino protective group is, for example, (Ph)3C, and FMOC(9-fluorenylmethyloxycarbonyl), alkoxycarbonyl, aryloxycarbonyl, aralkyloxycarbonyl and R5CO, R5SO2 where R5 is alkyl, aryl or aralkyl.
Abstract translation:本发明涉及一般化学式(Ia)或(Ib)表示的新的氮丙啶衍生物及其制备方法。 在所述化学式中,R 2和R 3可以相同或不同,它们分别是氢,低质量烷基或环烷基; R 4可以选自氢,烷基,芳基或氨基保护基; 和氨基保护基是例如(Ph)3 C,和FMOC(9-芴基甲氧基羰基),烷氧基羰基,芳氧基羰基,芳烷氧基羰基和R 5 CO,R SUB 芳基或芳烷基,其中R 5是烷基,芳基或芳烷基。