📜4'-Methylumbelliferyl 2,3,5-Tri-O-Acetyl-β-D-Ribofuranoside置于potassium Hydroxide体系中,用 甲醇 用作溶剂,化学反应 0.42H,以79%的收率获得4-甲基香豆素基-β-D-呋喃阿拉伯糖苷
参考文献:An Improved Helferich Method For The α/β-Stereoselective Synthesis Of 4-Methylumbelliferyl Glycosides For The Detection Of Microorganisms
标题:An Improved Helferich Method For The α/β-Stereoselective Synthesis Of 4-Methylumbelliferyl Glycosides For The Detection Of Microorganisms
摘要:提出了一种改进的helferich方法,涉及在温和条件下,将4-甲基伞形酮与糖基乙酸酯在三氟化硼乙醷存在下与三乙胺,吡啶或4-二甲氨基吡啶联合使用进行糖基化,随后脱保护得到荧光4-甲基伞形酰基糖苷底物.由于使用碱基,糖基化反应更容易进行,具有不寻常的α或β立体选择性,并在适当条件下获得中等至优异的收率(51%至94%).
Doi:10.3390/molecules201219789