Total Syntheses of Carbohydrates, IV. 2-Deoxy-DL-, L- and D-<i>erythro</i>-pentoses and Related Sugars
作者:Gen Nakaminami、Sachiko Shioi、Yoko Sugiyama、Satoko Isemura、Mikio Shibuya、Masazumi Nakagawa
DOI:10.1246/bcsj.45.2624
日期:1972.8
5-dideoxy-threo-pentono-γ-lactone (III) could be obtained stereoselectively from 3-hydroxy-4-pentenoic acid (I) by the reaction with N-bromosuccinimide in water. On successive treatment with an aqueous potassium hydroxide and an acid type cation exchange resin, bromolactone (III) gave stereoselectively 2-deoxy-erythro-pentono-γ-lactone (IV). Reduction of IV by means of bis(1,2-dimethylpropyl)borane afforded
5-Bromo-2,5-dideoxy-threo-pentono-γ-lactone (III) 可以立体选择性地从 3-hydroxy-4-pentenoic acid (I) 与 N-bromosuccinimide 在水中反应获得。在用氢氧化钾水溶液和酸型阳离子交换树脂连续处理后,溴内酯 (III) 得到立体选择性的 2-脱氧-赤型-戊酮-γ-内酯 (IV)。通过双(1,2-二甲基丙基)硼烷还原IV,得到2-脱氧-赤型-戊糖(V)。3-Hydroxy-4-pentenoic acid (I) 可以被光学拆分。(+)-酸产生2-脱氧-D-赤型-戊糖(DV),(-)-酸可转化为2-脱氧-L-赤型-戊糖(LV)。2,5-Dideoxy-threo-pentose (VIII) 和 5-bromo-2,5-dideoxy-threo-pentose (IX) 从溴内酯 (III) 中获得。