ortho-Selective nucleophilic addition of amines to 3-borylbenzynes: synthesis of multisubstituted anilines by the triple role of the boryl group
作者:Akira Takagi、Takashi Ikawa、Kozumo Saito、Shigeaki Masuda、Toyohiro Ito、Shuji Akai
DOI:10.1039/c3ob41787e
日期:——
Nucleophilic addition of amines to 3-[(dan)boryl]benzynes (dan = 1,8-diaminonaphthalene) generated by a fluoride ion proceeded with high ortho-selectivity to give 2-borylaniline derivatives, under conditions that are tolerant to various functional groups. The (dan)boryl group of the adduct was hydrolyzed into a boronic acid under acidic conditions, which could further serve for various C–C, C–O, C–N
在耐各种官能团的条件下,将胺亲核加成到氟离子产生的3-[(单)硼基]苯并酮(dan = 1,8-二氨基萘)上,以高邻位选择性进行,得到2-硼基苯胺衍生物。 。加合物的(dan)硼烷基在酸性条件下水解成硼酸,可进一步用于各种C–C,C–O,C–N和C–H键形成反应。整个过程为制备多取代的苯胺衍生物提供了有希望的入口。