作者:Ekaterina V. Vinogradova、Nathaniel H. Park、Brett P. Fors、Stephen L. Buchwald
DOI:10.1021/ol400369n
日期:2013.3.15
synthesis of aryl carbamates was achieved by introducing alcohols into the reaction of palladium-catalyzed cross-coupling of ArX (X = Cl, OTf) with sodium cyanate. The use of aryl triflates as electrophilic components in this transformation allowed for an expanded substrate scope for direct synthesis of aryl isocyanates. This methodology provides direct access to major carbamate protecting groups,
通过将醇引入钯催化的 ArX (X = Cl, OTf) 与氰酸钠的交叉偶联反应中,实现了芳基氨基甲酸酯的有效合成。在此转化中使用芳基三氟甲磺酸酯作为亲电组分允许扩大用于直接合成芳基异氰酸酯的底物范围。该方法提供了对主要氨基甲酸酯保护基团、S-硫代氨基甲酸酯和聚氨酯材料的二异氰酸酯前体的直接访问。