通过两个串联的S N Ar事件方便地组装特权(杂)芳烃融合的苯并[1.4]氮杂ze庚烷。第1部分–关于间歇性微笑重新安排的重要性
摘要:
已设计了通过S N Ar-Smiles重排-S N Ar级联反应合成的[1.4]氮杂氮杂的新双亲核前体。将它们与芳香族双亲电子试剂在碱促进的缩合反应中使用,可以区分高反应性和低反应性的底物(即分别可以通过和不能通过Smiles重排屏障的底物)。通过在双亲电子前体中引入吸电子取代基,可以恢复对所需环化过程的反应性。这有力地说明了笑容重排对于成功形成整个戒指的重要性。
Indium-catalyzed reaction for the synthesis of carbamates and carbonates: selective protection of amino groups
作者:Joong-Gon Kim、Doo Ok Jang
DOI:10.1016/j.tetlet.2009.03.143
日期:2009.6
We developed a simple, efficient, and selective method for preparing organic Carbamates and carbonates using a catalytic amount of indium. A wide range of carbamates and carbonates were synthesized in high yields. The method is also applicable to the selective protection of amino groups under mild conditions. (C) 2009 Elsevier Ltd. All rights reserved.