A process for producing a nucleoside derivative (1) by reacting a substituted 2,3-dihydrofuran derivative (2) with an organohalogen compound (3) containing a group 16 element of the periodic table to give a substituted 2- halotetrahydrofuran derivative (4), condensing the derivative (4) with a nucleic acid base to give a substituted nucleoside derivative (5), and reducing the derivative (5), wherein R1 represents hydrogen, alkyl or R6-O-CH2-; R2 to R4 represent each hydrogen or a group containing a group 14-17 element of the periodic table; R5 represents optionally substituted alkyl or phenyl; A represents a group 16 element of the periodic table; B represents a nucleic acid base; and X represents halogen.
通过将取代的
2,3-二氢呋喃衍
生物(2)与含周期表第16族元素的有机卤化物(3)反应,从而得到取代的2-卤代
四氢呋喃衍
生物(4),将衍
生物(4)与核酸碱基缩合以得到取代的核苷衍
生物(5),并还原衍
生物(5),从而生产核苷衍
生物(1)的方法,其中R1代表氢、烷基或R6-O-
CH2-;R2到R4分别代表氢或含周期表第14-17族元素的基团;R5代表可选择地取代的烷基或苯基;A代表周期表第16族元素;B代表核酸碱基;X代表卤素。