A General Procedure to Selectively Prepare<i>N</i>-Alkylanilines by an Unexpected Reaction of (<i>Z</i>)-(<i>tert</i>-Butylsulfanyl)(aryl)diazenes with Alkyllithium Reagents
作者:Iacopo Degani、Stefano Dughera、Margherita Barbero、Rita Fochi
DOI:10.1055/s-2003-38082
日期:——
has been set up to prepare, selectively, the N-monoalkylanilines 7, reacting (Z)-(tert-butylsulfanyl)(aryl)diazenes 3 with alkyllithium 6 (MeLi, BuLi, s-BuLi, n-C 6 H 1 3 Li). The reactions were carried out in anhydrous diethyl ether at 0 °C or -78 °C, depending on the reagent 6, and then at room temperature. In optimal conditions the yields of the pure products 7 (uncontaminated by dialkylation products)
已经建立了一个通用程序来选择性地制备 N-单烷基苯胺 7,使 (Z)-(叔丁基硫烷基)(芳基)二氮烯 3 与烷基锂 6 (MeLi, BuLi, s-BuLi, nC 6 H 1 3李)。根据试剂6,反应在0°C或-78°C的无水乙醚中进行,然后在室温下进行。在最佳条件下,纯产物 7(未被二烷基化产物污染)的产率从好到极好:对于 38 个考虑的例子,34 个是阳性的,产率在 61% 和 91% 之间变化(平均产率 78%)。进行了附带证明以支持假设的反应机制。