- A solid-phase approach to novel purine and nucleoside analogs
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This paper describes a method for the preparation of purine analogs using the solid-phase approach. Nucleoside bases were constructed on Merrifield resin by sequential displacement of purine dichloride with amines, and after detachment, the purine analogs were condensed with d,l-ribofuranoside compounds by the Vorbrueggen method. Thereof, l-ribofuranoside was prepared from l-arabinose via the selective oxidation-reduction procedure of the 2-OH group. Some compounds exhibited moderate activity against HIV-1 in PBM cells.
- Chang, Junbiao,Dong, Chunhong,Guo, Xiaohe,Hu, Weidong,Cheng, Senxiang,Wang, Qiang,Chen, Rongfeng
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p. 4760 - 4766
(2007/10/03)
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- PROCESS FOR THE PREPARATION OF 2'- FLUORO-5-METHYL-BETA-L-ARABINO- FURANOSYLURIDINE
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The present invention relates to a novel and improved process for preparing 2′-fluoro-5-methyl-β-L-arabinofuranosyluridine represented by formula (1) which shows anti-viral activity, especially potent anti-viral activity against hepatitis B-virus and Epstein-Barr virus:
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- A practical synthesis of L-FMAU from L-arabinose
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A practical synthesis of 2'-deoxy-2'-fluoro-5-methyl-β-L- arabinofuranosyl uracil (14, L-FMAU) was developed from L-arabinose. L- Arabinose was convened to L-ribose 5, which was used for the synthesis of bromosugar 12 via 2,3,5-O-tribenzoyl-1-O-acetyl-β-L-ribofuranose 8, which was subjected to condensation with silylated thymine and the resulting protected L-FMAU 13 was deprotected to afford L-FMAU in 14 steps in 8% overall yield.
- Du, Jinfa,Choi, Yongseok,Lee, Kyeong,Chun, Byoung K.,Hong, Joon H.,Chu, Chung K.
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p. 187 - 195
(2007/10/03)
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