申请人:Taiho Pharmaceutical Co., Ltd.
公开号:US05880294A1
公开(公告)日:1999-03-09
The present invention relates to D-pentofuranose derivatives represented by the following formulas (1) through (4): ##STR1## (wherein A represents a chlorobenzoyl group; R.sup.1 represents a hydrogen atom, an aliphatic lower acyl group, a substituted or unsubstituted benzoyl group; each of X and Y represents a lower alkyl group; Z represents an ethynyl group or tri-lower alkyl silylethynyl group; the sugar moiety in formula (1) represents xylose; and the sugar moiety of each of formulas (3) and (4) represents ribose). The present invention also relates to a process for preparing the compound (2) characterized by oxidizing the compound of formula (1) with a hypochlorite in the presence of a catalytic amount of 2,2,6,6-tetramethylpiperidinoxy compound, and these compounds are useful as intermediates in the synthesis of 3'-C-substituted ribonucleoside derivatives having excellent antitumor activities.
本发明涉及通式(1)至(4)所示的D-戊呋喃糖衍生物:##STR1##(其中A代表氯苯甲酰基;R1代表氢原子、低级脂肪族酰基、取代或未取代的苯甲酰基;X和Y各自代表低级烷基;Z代表乙炔基或三低级烷基硅乙炔基;式(1)中的糖部分代表木糖;式(3)和(4)中的糖部分各自代表核糖)。本发明还涉及制备化合物(2)的方法,其特征在于在2,2,6,6-四甲基哌啶氧基化合物催化量的存在下,用次氯酸盐氧化式(1)的化合物,这些化合物作为合成具有优异抗肿瘤活性的3'-C-取代的核糖核苷衍生物的中间体是有用的。