Developing cellulosic waste products as platform chemicals: protecting group chemistry of α-glucoisosaccharinic acid
作者:Michael Almond、Mustapha G. Suleiman、Matthew Hawkins、Daniel Winder、Thomas Robshaw、Megan Waddoups、Paul N. Humphreys、Andrew P. Laws
DOI:10.1016/j.carres.2017.11.013
日期:2018.1
beta-glucoisosaccharinic acids ((2S,4S)-2,4,5-trihydroxy-2-(hydroxymethyl)pentanoic acid and (2R,4S)-2,4,5-trihydroxy-2-(hydroxymethyl)pentanoic acid) which are produced when cellulosic materials are treated with aqueous alkali are potentially valuable platform chemicals. Their highly functionalised carbon skeleton, with fixed chirality at C-2 and C-4, makes them ideal starting materials for use in synthesis. In order
α和β-葡萄糖异糖酸((2S,4S)-2,4,5-三羟基-2-(羟甲基)戊酸和(2R,4S)-2,4,5-三羟基-2-(羟甲基)戊酸纤维素材料用碱水溶液处理时产生的)可能是有价值的平台化学品。它们具有高度官能化的碳骨架,在C-2和C-4上具有固定的手性,使其成为用于合成的理想起始原料。为了评估这些糖精酸作为平台化学品的潜力,我们探索了内酯形式的α-葡萄糖异糖精酸(α-GISAL)的保护基化学。我们在这里报告了单步和多步反应途径的使用,可导致α-GISAL的三个不同羟基的区域选择性保护。我们报告了单独或成对保护三个不同羟基的策略。我们还报告了一系列三-O-保护的α-GISAL衍生物的合成,其中许多产品都包含正交保护基。