system of the angucycline antibiotics and analogues thereof are reported. The key step in their preparation was the C-glycosylation reaction of 5-hydroxy-1,4-dimethoxynaphthalene and a series of 1-O-acyl-2-deoxy and 1-O-acyl-2, 6-dideoxy sugar electrophiles promoted by boron trifluoride etherate. The use of the participating solvent, acetonitrile, was essential for the success of the reaction.
报道了环霉素抗生素及其类似物的保护的C-糖基取代的
CD环系统的合成。它们制备的关键步骤是5-羟基-
1,4-二甲氧基萘与一系列促进1 - O-酰基-2-脱氧和1 - O-酰基-2,6-二脱氧糖亲电试剂的C-糖基化反应由
三氟化硼醚化。参与溶剂
乙腈的使用对于反应成功是必不可少的。