Organocatalytic Oxidative Cyclization of Amidoximes for the Synthesis of 1,2,4‐Oxadiazolines
作者:Vineet Kumar Soni、Jun Kim、Eun Jin Cho
DOI:10.1002/adsc.201800238
日期:2018.7.16
using 2,4,6‐tris(4‐fluorophenyl)pyrylium tetrafluoroborate (T(p‐F)PPT) as the organocatalyst, and molecular oxygen as the green oxidant. During the transformation, T(p‐F)PPT acts as both the electrophilic catalyst and photocatalyst, and the reaction is promoted by irradiation with visible light. The method introduced herein offers a straightforward route to the preparation of 1,2,4‐oxadiazolines with different
报道了双环和三环稠合的1,2,4-恶二唑啉的有机催化合成。该反应通过使用2,4,6-三(4-氟苯基)四氟硼酸吡啶鎓(T(p -F )PPT)作为有机催化剂和分子氧作为绿色氧化剂,通过对相应的肟肟的氧化环化来进行。在转化过程中,T(p- F )PPT既是亲电子催化剂又是光催化剂,通过可见光照射可促进反应。本文介绍的方法为制备具有不同功能的1,2,4-恶二唑啉提供了一条直接途径,并且在经济上非常经济。