Stereoselective entry to 1′-C-branched 4′-thionucleosides from 4-thiofuranoid glycal: synthesis of 4′-thioangustmycin C
作者:Kazuhiro Haraguchi、Haruhiko Takahashi、Hiromichi Tanaka
DOI:10.1016/s0040-4039(02)01131-0
日期:2002.8
1′-C-carbon-substituted 4′-thionucleosides has been developed. The present method consists of the following steps: (1) preparation of the 1-C-carbon-substituted 4-thiofuranoid glycals based on lithiation, and (2) NIS- or PhSeCl-initiated stereoselective glycosidation to these 1-substituted glycals. This synthetic sequence enabled us to synthesize the 4′-thio analogue of antitumor antibiotic angustmycin
已经开发了用于合成新型1' - C-碳取代的4'-硫代核苷的立体选择性合成方法。本方法包括以下步骤:(1)基于锂化制备1 - C-碳取代的4-硫呋喃类糖,和(2)NIS-或PhSeCl引发的对这些1-取代的糖的立体选择性糖苷化。该合成序列使我们能够合成抗肿瘤抗生素阿古霉素C的4'-硫代类似物。