Dearomatizing spirocyclization of thioureas, ureas and guanidines
作者:Marian N. Aziz、Ravi P. Singh、Delphine Gout、Carl J. Lovely
DOI:10.1016/j.tetlet.2021.153054
日期:2021.5
An investigation of the dearomatization reactions of benzylic thioureas, ureas and guanidines using hypervalent iodine reagents is described. Initial attempts to perform this reaction with methyl aryl ethers was compromised by electrophilic addition leading to the formation of benzo[d]thiazoles. However, inverting the direction of the process and oxidizing the corresponding phenol delivered the desired
描述了使用高价碘试剂对苄基硫脲,脲和胍的脱芳香化反应的研究。用亲电子加成反应损害了用甲基芳基醚进行该反应的最初尝试,导致形成了苯并[ d ]噻唑。然而,颠倒过程的方向并氧化相应的苯酚,对于所有三个家族,均以中等至良好的产率提供了所需的螺稠合杂环。