The practical synthesis of β-acyl glucuronides by using allyl 2,3,4-tri-( O -allyloxycarbonyl)- d -glucuronate and 1-chloro- N , N ,2-trimethyl-1-propenylamine
作者:Muneki Nagao、Masashi Suzuki、Yasuo Takano
DOI:10.1016/j.tetlet.2016.06.057
日期:2016.7
We described the practical synthesis of β-acyl glucuronide from allyl 2,3,4-tri-(O-allyloxycarbonyl)-d-glucuronate (5) mediated by 1-chloro-N,N,2-trimethyl-1-propenylamine (TMCE). A wide range of bulky carboxylic acids (aryl carboxylic acids or tertiary-carbon-linked carboxylic acids) were employed to give the corresponding β-acyl glucuronate in good yields. The side products of this reaction are only
我们描述了由1,3-氯,N,N,2-三甲基-1-丙烯胺(2,3,4-tri-(O - alaloxyoxymethoxy)-d -glucuronate (5)介导的β-酰基葡萄糖醛酸的实际合成TMCE)。各种大体积的羧酸(芳基羧酸或叔碳连接的羧酸)被用来以良好的产率得到相应的β-酰基葡糖醛酸酯。该反应的副产物仅为N,N-二甲基异丁酰胺和HCl。由于所得的酰基葡萄糖醛酸酸酯显示出对有机溶剂足够的溶解度,因此可以容易地通过常规硅胶柱色谱法和/或结晶纯化,即使以克数计也是如此。Pd(0)干净地除去了烯丙氧基羰基和烯丙基,因此该方案可提供多克数量的高纯度β-酰基葡糖醛酸苷。