Direct Introduction of an N,N′-Nonsubstituted Carboxamidine Group by Grignard Addition to Silylated Cyanamide
作者:Thomas Guethner、Eva Huber、Juergen Sans、Franz Thalhammer
DOI:10.1055/s-0036-1589000
日期:2017.7
A new, widely applicable method to substitute a halogen atom by a nonsubstituted carboxamidine group is presented. Grignard addition to N,N′-bis-trimethylsilylcarbodiimide gives amidinates, which split off the silyl groups during standard aqueous workup. The corresponding amidines are obtained in high yield with high selectivity. Examples for purification procedures are given.
提出了一种用未取代的甲脒基团取代卤素原子的新的、广泛适用的方法。格氏加成到 N,N'-双-三甲基甲硅烷基碳化二亚胺得到脒酸盐,在标准的水处理过程中会分裂出甲硅烷基。以高收率和高选择性获得相应的脒。给出了纯化程序的例子。