Development of Triazine-Based Benzylating Reagents Possessing <i>t</i>-Butyl Group on the Triazine Core: Thermally Controllable Reagents for the Initiation of Reaction
作者:Yukiko Karuo、Kohei Yamada、Munetaka Kunishima
DOI:10.1248/cpb.c17-00897
日期:——
Benzylating reagents, 4-(4,6-di-t-butyl-1,3,5-triazin-2-yl)-4-benzylmorpholinium triflate, and related derivatives have been developed. The reagents release benzyl triflate as a benzyl cation equivalent upon heating the solution to 40°C under neutral conditions. The O-benzylation of alcohols using a stoichiometric amount of these reagents afforded corresponding benzyl ethers in good to high yields
已经开发了三氟甲磺酸酯化试剂,4-(4,6-二叔丁基-1,3,5-三嗪-2-基)-4-苄基吗啉鎓及其相关衍生物。在中性条件下将溶液加热至40°C时,试剂会释放出三氟甲磺酸苄酯(苄基阳离子当量)。使用化学计量的这些试剂的醇的O-苄基化以良好或高收率提供了相应的苄基醚。这是由于这些试剂的三嗪环上存在庞大的叔丁基,从而阻止了三氟甲磺酸苄酯通过与吗啉代三嗪衍生物的副反应而消耗。