Convenient synthesis of 2,3-O-isopropylidene-5-thio-d-ribose and 5-thio-d-ribose; synthesis of 1,4-anhydro-2,3-O-isopropylidene-α-d-ribopyranose and 1,4-anhydro-2,3-O-isopropylidene-5-thio-α-d-ribopyranose
作者:Andrea Fleetwood、Neil A. Hughes
DOI:10.1016/s0008-6215(99)00064-6
日期:1999.4
Abstract Sequential mesylation–acetylation of 2,3-O-isopropylidene- d -ribofuranose gave 1-O-acetyl-2,3-O-isopropylidene-5-O-methanesulfonyl-β- d -ribofuranose that was converted into 1-O-acetyl-5-(S)-acetyl-2,3-O-isopropylidene-5-thio-β- d -ribose, deacetylation of which gave 2,3-O-isopropylidene-5-thio- d -ribose as the β-pyranose form, which was hydrolysed to 5-thio- d -ribose. 1,4-Anhydro-2,3-O-isopropylidene-α-
摘要2,3-O-异亚丙基-d-呋喃核糖的顺序甲基化—乙酰化得到1-O-乙酰基-2,3-O-异亚丙基-5-O-甲磺酰基-β-d-核呋喃糖,将其转化为1-O -乙酰基-5-(S)-乙酰基-2,3-O-异亚丙基-5-硫代-β-d-核糖,其脱乙酰基得到2,3-O-异亚丙基-5-硫代-d-核糖。 β-吡喃糖形式,被水解为5-硫代-d-核糖。通过1-O-乙酰基-2,3-O-异亚丙基-5-O-甲磺酰基-β-d-的甲醇钠处理获得1,4-脱水-2,3-O-异亚丙基-α-d-核糖吡喃糖。通过1-(S)-乙酰基-2,3-O-异亚丙基-5-O-甲磺酰基类似地合成呋喃核糖和1,4-脱水-2,3-O-异亚丙基-5-硫代-α-d-核糖吡喃糖-5-硫代-α-d-呋喃核糖。