Nucleosides. 121. Improved and general synthesis of 2'-deoxy-C-nucleosides. Synthesis of 5-(2-deoxy-.beta.-D-erythro-pentofuranosyl)uracil, -1-methyluracil, -1,3-dimethyluracil, and -isocytosine
作者:Krzysztof Pankiewicz、Akira Matsuda、Kyoichi A. Watanabe
DOI:10.1021/jo00342a022
日期:1982.1
Nucleosides. 107. Synthesis of 5-(.beta.-D-arabinofuranosyl)isocytosine and related C-nucleosides
作者:C. K. Chu、U. Reichman、K. A. Watanabe、J. J. Fox
DOI:10.1021/jm00199a017
日期:1978.1
A Stereocontrolled Total Synthesis of<i>C</i>-Nucleosides
作者:Tsuneo Sato、Yoshihiro Hayakawa、Ryoji Noyori
DOI:10.1246/bcsj.57.2515
日期:1984.9
A stereocontrolled, generalsynthesis of chiral C-nucleosides has been achieved through a common lactonic C-β-glycoside intermediate which is readily obtainable from non-carbohydrate materials. Osm...
作者:K.W. Pankiewicz、A. Matsuda、K.A. Watanabe、J.J. Fox
DOI:10.1016/0040-4020(84)85100-5
日期:——
Methods were developed to prepare 1 -methyl-, 3-methyl- and 4-0-methyl-ψ-isocytidine by selective methylation.35O-Tetraisopropyldisiloxanyl-ψ isocytidine (8) was trimethylsilylated and then treated with MeI and, after deprotection, 1 -methyl-ψ isocytidine (6) was obtained. The 2deoxy analog (7) was also prepared in a similar manner from the 2deoxy analog (10) of 8. Treatment of 8 with CH2N2 afforded
方法的发展,以制备1-甲基,3-甲基和4-0甲基ψ-异胞苷通过选择性methylation.3 5 O型四异丙-ψ异胞苷(8)中的三甲基硅烷化,然后用MeI处理,在脱保护后得到1-甲基-ψ异胞苷(6)。2脱氧类似物(7被以相似的方式也制备)从2脱氧类似物(10)的8。用CH 2 N 2处理8得到主要产物3-甲基-ψ-异胞苷衍生物(19)。重氮甲烷的甲基化也主要发生在2个脱氧类似物的N3上10至20。从19和20除去3 5 O-保护基团,分别得到3-甲基-ψ-异胞苷(14)和其2-脱氧类似物(15)。另一方面,2-N-乙酰基-3 5 O-四异丙基二硅氧烷基-tetra-异胞苷(24)经CH 2 N 2处理,得到了4-O-甲基衍生物(25)作为主要产物。随后25的脱保护得到4-O-甲基-ψ-异胞苷(29)。aiv51b1p33b