Nucleosides: XI. Synthesis and Antiviral Evaluation of 5'-Alkylthio-5'-deoxy Quinazolinone Nucleoside Derivatives as S-Adenosyl-L-homocysteine Analogs
作者:Tun-Cheng Chien、Chien-Shu Chen、Fang-Hwa Yu、Ji-Wang Chern
DOI:10.1248/cpb.52.1422
日期:——
the beta-anomer. This quinazoline nucleoside and its 2',3'-O-isopropylidene derivative (9) did not undergo the coupling reaction with dialkyl disulfides in the presence of tri-n-butylphosphine unless their 4-amino groups were protected by N,N-dimethylaminomethylidene. This approach provides a viable alternative synthetic route to 5'-alkylthio-5'-deoxy nucleosides.
4-氨基-1-(β-D-呋喃呋喃糖基)喹唑啉-2-酮(3)是通过使用Vorbruggen的甲硅烷基化方法将4-氨基喹唑啉-2-酮(7)直接糖基化制备的,仅提供β-端基异构体。在三正丁基膦存在下,该喹唑啉核苷及其2',3'-O-异亚丙基衍生物(9)不会与二烷基二硫化物发生偶联反应,除非它们的4-氨基被N,N-二甲基氨基亚甲基保护。该方法为5'-烷硫基-5'-脱氧核苷提供了可行的替代合成途径。