Influence of acyl groups on glucopyranoside reactivity in Lewis acid promoted anomerisation
作者:Mark P. Farrell、Lisa M. Doyle、Paul V. Murphy
DOI:10.1016/j.tetlet.2018.05.076
日期:2018.7
Lewis acid promoted anomerisation has potential in O- or S-glycoside synthesis. Herein, the anomerisation kinetics of thirty-one β-d-glucopyranosides was determined to determine how particular acyl protecting groups and their location influence reactivity towards a Lewis acid promoted reaction. The replacement of acetyl groups with benzoyl groups led to reduced reactivity when located at O-3, O-4 and
路易斯酸促进的异构化在O-或S-糖苷合成中具有潜力。在本文中,确定了三十一个β- d-吡喃葡萄糖苷的异构化动力学,以确定特定的酰基保护基及其位置如何影响对路易斯酸促进的反应的反应性。当位于O-3,O-4和O-6处时,用苯甲酰基取代乙酰基会导致反应性降低。然而,当O-2处的乙酰基被苯甲酰基取代时,观察到反应性增加。与四苯甲酸酯相比,2,3,4,6-四-O-(4-甲氧基)苯甲酸酯的速率增加约2倍。