Nucleosides and nucleotides. 95. Improved synthesis of 1-(2-azido-2-deoxy-.beta.-D-arabinofuranosyl)cytosine (Cytarazid) and -thymine. Inhibitory spectrum of Cytarazid on the growth of various human tumor cells in vitro
作者:Akira Matsuda、Johji Yasuoka、Takuma Sasaki、Tohru Ueda
DOI:10.1021/jm00107a018
日期:1991.3
eta-D-arabinofuranosyl)thymine (7), it was heated in N,N-dimethylformamide to produce 6,2'-imino-1-(2-deoxy-beta-D-arabinofuranosyl)thymine (8). This reaction disclosed the arabino configuration for 5a. Similarly the N3-benzoyluracil derivative 4b was transformed to the corresponding 2'-"up"-azidouridine derivative 5b, which was further converted to 1-(2-azido-2-deoxy-1-beta-D-arabinofuranosyl)cytosine
N3-苯甲酰基-1- [3,5-O-(四异丙基二硅氧烷] -1,3-二基)-β-D-呋喃核糖基]胸腺嘧啶(4a)与叠氮磷酸二苯酯,偶氮二羧酸二乙酯和三苯膦在四氢呋喃中的反应得到N3-苯甲酰基-1- [2-叠氮基-2-脱氧-3,5-O-(四异丙基二硅氧烷] -1,3-二基)-β-D-阿拉伯呋喃糖基] t亚胺(5a),产率高。在5a的解封序列得到1-(2-叠氮基-2-脱氧-β-D-阿拉伯呋喃糖基)胸腺嘧啶(7)之后,将其在N,N-二甲基甲酰胺中加热以产生6,2'-亚氨基-1- (2-脱氧-β-D-阿拉伯呋喃糖基)胸腺嘧啶(8)。该反应公开了5a的阿拉伯糖构型。类似地,将N3-苯甲酰基尿嘧啶衍生物4b转化为相应的2'-“上”-叠氮基尿苷衍生物5b,将其进一步转化为1-(2-叠氮基-2-脱氧-1-β-D-阿拉伯呋喃糖基)胞嘧啶(1 ,阿糖胞苷)。