作者:Rui Zhang、Guanyu Han、Luobin Jiang、Yao Shen、Rui Yang、Yongjun Mao、Hang Wang
DOI:10.1002/jhet.2931
日期:2017.11
New and practical synthetic route of ivacaftor is described on a grams scale. An electrophilic addition of two t‐butyl groups to the aromatic ring is adopted to prepare 5‐amino‐2,4‐di‐t‐butylphenol in 61% yield over three steps with 98.1% purity (high‐performance liquid chromatography). An intramolecular cyclization of ethyl 3‐(2‐aminophenyl)‐3‐oxo‐propanoate with dimethylformamide‐dynamic mechanical