Chin. J. Org. Chem. ›› 2016, Vol. 36 ›› Issue (11): 2729-2734.DOI: 10.6023/cjoc201605036 Previous Articles     Next Articles



孙志东, 朱云龙, 黄海洋, 宋贤荣, 肖强   

  1. 江西科技师范大学有机功能分子研究所 江西省有机功能分子重点实验室 南昌 330013
  • 收稿日期:2016-05-19 修回日期:2016-07-04 发布日期:2016-07-15
  • 通讯作者: 肖强
  • 基金资助:


Studies on the Total Synthesis of iso-L-Cystidine

Sun Zhidong, Zhu Yunlong, Huang Haiyang, Song Xianrong, Xiao Qiang   

  1. Key Laboratory of Organic Chemistry in Jiangxi Province, Institute of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013
  • Received:2016-05-19 Revised:2016-07-04 Published:2016-07-15
  • Supported by:

    Project supported by National Natural Science Foundation of China (No.21462019),the New Century Excellent Talents in University (No.11-1000),and the Bureau of Science&Technology of Jiangxi Province (No.20143ACB20012).

In order to systematic study the biological effects of isonucleoside incorporated oligonucleotides, an efficient synthetic process for iso-L-cystidine was investigated in present paper. Using L-ribose as starting material, iso-L-cystidine was obtained in 9 steps and 28.5% overall yield. The key step was the regioselective nucleophilic substitution of 5-O-triphenylmethane-2,3-O-cyclic sulfate with uracil. After extensive optimization, it was found that using cesium carbonate as base can improve significantly the N-1 glycosidic bond formation and reduce the side reactions. At the same time, a N-1,N-3 doublic 1-deoxyribose substituted iso-L-uridine was identified for the first time. The present reported synthetic process has the merits of mild reaction conditions, easy purified intermediates and high overall yield, which could be used as a general synthetic approach for the preparation other related isonucleoside.

Key words: nucleosides, total synthesis, glycosidation, nucleophilic substitution, isonucleosides