alcohol sulfamoylation that deploys electron-deficient aryl sulfamates as activated group transfer reagents. The reaction utilizes the simple organic base N-methylimidazole, proceeds under mild conditions, and provides intrinsic selectivity for 1° over 2° alcohols (up to >40:1 for certain nucleosides). The requisite aryl sulfamate donors are stable crystalline solids that can be readily prepared on
我们报告了一种新的
乙醇氨磺酰化催化方法,该方法将缺乏电子的芳基
氨基磺酸盐用作活化基团转移试剂。该反应利用简单的有机碱
N-甲基咪唑,在温和的条件下进行,并提供1°超过2°的醇的固有选择性(某些核苷最高> 40:1)。必需的
氨基磺酸芳基酯供体是稳定的结晶固体,可以容易地大规模制备。机理上的考虑支持了HNSO2“氮杂亚砜”在转移反应中的中介作用。