申请人:Mitsui Chemicals, Inc.
公开号:US20030229223A1
公开(公告)日:2003-12-11
A protected 2′-deoxycytidine is purified by precipitating the protected 2′-deoxycytidine represented by general formula (3) in the form of a hydrated crystal from a solution containing the protected 2′-deoxycytidine and water, and by recovering the protected 2′-deoxycytidine:
1
wherein R1 represents a 4-methoxytrityl, 4,4′-dimethoxytrityl, or triphenylmethyl group; and B1 represents a cytosine group having a protected amino group. The compound represented by general formula (3) is, in particular, a protected 2′-deoxycytidine represented by formula (4):
2
The 2′-deoxycytidine is used as a raw material for antisense DNA.
一种受保护的2'-脱氧胞苷通过从含有受保护的2'-脱氧胞苷和水的溶液中沉淀代表通式(3)的受保护的2'-脱氧胞苷的水合晶形式来纯化,并通过回收受保护的2'-脱氧胞苷来制备:其中R1代表4-甲氧三苯甲基、4,4'-二甲氧三苯甲基或三苯甲基基团;B1代表具有受保护氨基的胞嘧啶基团。特别地,通式(3)所代表的化合物是由式(4)所代表的受保护的2'-脱氧胞苷:2这种2'-脱氧胞苷用作反义DNA的原材料。