最初级的问题:糖做甲苷用什么中和啊? 你要的是pyran or furan型啊?另外象楼上版主说的,你需要哪种构型为主的产物,这些你要说清楚才能帮你。 不同的催化剂和反应条件,会生成不同类型为主的产物。 一般来说,以hcl或者accl/meoh in situ 生成hcl大都会得到呋喃型产物,其中a型为主。下面是生成呋喃型d-xylose的甲基苷混合物最常用的procedure,你参考一下吧。如果你需要吡喃型的,就用socl2催化吧。 to a stirred solution of d-xylose (10 g, 66.61 mmol) in anhydrous methanol (46 ml) was added acetyl chloride (0.31 ml) dropwise at ambient temperature under nitrogen and the reaction mixture was stirred overnight at ambient temperature under nitrogen. the reaction mixture was neutralized with silver nitrate and filtrated through a celite pad. the filtrate was evaporated to dryness to give a crude mixture of 1-methyl a, b-d-xylose as a sticky oil, yields 90%。 祝实验顺利! 查看更多