Divergent Access to (1,1) and (1,2)‐Azidolactones from Alkenes using Hypervalent Iodine Reagents
作者:Sébastien Alazet、Franck Le Vaillant、Stefano Nicolai、Thibaut Courant、Jerome Waser
DOI:10.1002/chem.201702599
日期:2017.7.18
versatile synthesis of azidolactones through azidation and cyclization of carboxylic acids onto alkenes has been developed. Based on either photoredox or palladium catalysis, (1,1) and (1,2) azido lactones can be selectively synthesized. The choice of catalyst and benziodoxol(on)e reagent serving as azide source was essential to initiate either a radical or Lewis acid mediated process with divergent
通过将羧酸叠氮化和环化到烯烃上,已开发了一种通用的叠氮内酯合成方法。基于光氧化还原或钯催化,可以选择性地合成(1,1)和(1,2)叠氮基内酯。选择催化剂和用作叠氮化物源的苯并齐多醇试剂对于引发自由基或路易斯酸介导的过程具有不同的结果至关重要。这些转化是在温和的条件下使用低催化剂负载量进行的,并获得了大范围的叠氮基内酯。