作者:Constantinos Spyropoulos、Christoforos G. Kokotos
DOI:10.1021/jo500492x
日期:2014.5.16
one-pot synthesis of ureas is described. Boc-protected amines can be transformed into nonsymmetrical and symmetrical disubstituted and trisubstituted ureas utilizing 2-chloropyridine and trifluoromethanesulfonyl anhydride for the in situ generation of an isocyanate, which reacts with an amine. A variety of amines can be employed successfully, leading to high yields of isolated ureas.
描述了一种实用的一锅法合成尿素。Boc保护的胺可以利用2-氯吡啶和三氟甲磺酰基酐转化为不对称和对称的二取代和三取代的脲,以原位生成与胺反应的异氰酸酯。可以成功使用多种胺,从而导致高产率的分离出的尿素。