The present invention relates to the synthesis of 2′-deoxy-&bgr;-L-thymidine, 2′-deoxy-&bgr;-L-uridine and 2′-deoxy-&bgr;-L-cytidine, and their derivatives, such as the 3′-O-acyl or 3′,5′-O-diacyl prodrugs, including the 3′-O-L-aminoacyl and 3′,5′-O-L-diaminoacyl prodrugs, and particularly the 3′-O-L-valinyl and 3′,5′-O-L-divalinyl prodrugs.
本发明涉及2'-脱氧-β-
L-胸苷、2'-脱氧-β-L-
尿苷和2'-脱氧-β-L-
胞苷的合成,以及它们的衍
生物,如3'-O-酰基或3',5'-O-二酰基前药,包括3'-O-L-
氨基酰和3',5'-O-L-二
氨基酰前药,特别是3'-O-L-缬
氨酰和3',5'-O-L-二缬
氨酰前药。