Unnatural enantiomers of 5-azacytidine analogues: Syntheses and enzymatic properties
作者:Gilles Gaubert、Christophe Mathé、Jean-Louis Imbach、Staffan Eriksson、Silvia Vincenzetti、Daniela Salvatori、Alberto Vita、Georges Maury
DOI:10.1016/s0223-5234(00)01184-3
日期:2000.11
beta-L-nucleoside analogues to evaluate their enzymatic and biological properties. 2'-Deoxy-beta-L-5-azacytidine (L-Decitabine), beta-L-5-azacytidine, 1-(beta-L-xylo-furanosyl)5-azacytosine, and 1-(2-deoxy-beta-L-threo-pentofuranosyl)5-azacytosine were stereospecifically prepared starting from L-ribose and L-xylose. D- and L-enantiomers of 2'-deoxy-beta-5-azacytidine were weak substrates of human recombinant deoxycytidine
尽管2'-脱氧-β-D-5-氮杂胞苷(地他滨)和β-D-5-氮杂胞苷显示出有效的抗白血病特性,但是它们对亲核试剂和胞苷脱氨酶催化的脱氨基反应的敏感性阻碍了它们的治疗用途。如先前所示[Shafiee M.,Griffon J.-F.,Gosselin G.,Cambi A.,Vincenzetti S.,Vita A.,Erikson S.,Imbach J.-L.,Maury G.,Biochem。Pharmacol。[J.Biol.Chem.56(1998)1237-1242],胞苷衍生物的β-L-对映异构体对胞苷脱氨酶具有抗性。因此,我们合成了几种5-氮杂胞嘧啶β-L-核苷类似物,以评估其酶促和生物学特性。2'-脱氧-β-L-5-氮杂胞苷(L-地他滨),β-L-5-氮杂胞苷,1-(β-L-二甲苯并呋喃糖基)5-氮杂胞嘧啶和1-(2-脱氧-β从L-核糖和L-木糖开始立体定向地制备-L-苏