tri-n-butylphosphine, followed by addition of di-t-butyl dicarbonate (Boc2O) affords, N-(t-Butoxycarbonyl)amines 2 in moderate to good overall yields. For secondary azides the formation of symmetrical disubstituted ureas is a competitive process. Conditions were found which, in the presence of a primary amine, allow for moderate selectivity for the reaction with Boc2O.
摘要 通过简单直接的顺序,用三
正丁基膦处理伯
叠氮化物,然后加入
二碳酸二叔丁酯 (Boc2O),以中等至良好的总产率提供 N-(叔丁氧基羰基)胺 2。对于仲
叠氮化物,对称双取代
脲的形成是一个竞争过程。发现在
伯胺的存在下允许与Boc 2 O反应具有中等选择性的条件。