An unusual behaviour of N-(tert-butoxycarbonyl)- and N-pivaloyl-(methylthio)anilines in metallation reactions
作者:Maria Grazia Cabiddu、Salvatore Cabiddu、Enzo Cadoni、Stefania De Montis、Claudia Fattuoni、Stefana Melis
DOI:10.1016/s0040-4020(03)00347-8
日期:2003.4
N-Boc-and N-Piv-(methylthio)anilines are here described. The results show that N-Boc derivatives are metallated only by superbases to give products substituted at the thiomethylic group. N-Piv derivatives show a different behaviour: ortho-derivative is metallated by both butyllithium and superbase at the thiomethylic carbon atom, while para-derivative is metallated in ortho to the N-Piv group by butyllithium
的金属化反应Ñ -Boc-和Ñ -Piv-(甲硫基)苯胺如下所述。结果表明,N -Boc衍生物仅被超碱金属化,得到在硫代甲基上取代的产物。N- Piv衍生物表现出不同的行为:邻位衍生物在硫代甲基碳原子上同时被丁基锂和超碱金属化,而对位衍生物在邻位被丁基锂和在超甲基上的硫代甲基碳原子上金属化至N- Piv基团。所述间-衍生物仅在硫代甲基碳原子上被超碱金属化。