AN IMPROVED SYNTHESIS OFN-BOC PROTECTED ARYL AMINES
摘要:
There are several known methods of protecting amines as their Boc derivatives. For less nucleophilic amines such as aryl amines these methods often give poor yields and are generally not satisfactory. Here, Boc aryl amines are obtained by first introducing two Boc groups followed by selective removal of one of them. This procedure works well for a number highly sterically hindered substrates as well as electron deficient and electron rich aryl amines.
Visible-Light-Mediated Nitration of Protected Anilines
作者:Simon J. S. Düsel、Burkhard König
DOI:10.1021/acs.joc.7b03260
日期:2018.3.2
The photocatalytic nitration of protected anilines proceeds with riboflavin tetraacetate as an organic photoredox catalyst. Sodium nitrite serves as the NO2 source in this visible-light-driven room temperature reaction. Various nitroanilines are obtained in moderate to good yields without the addition of acid or stoichiometric oxidation agents. The catalytic cycle is closed by aerial oxygen as the