Disclosed is a method for preparing a benzofuran derivative. In particular, provided is a method for preparing a benzofuran derivative, wherein according to the method provided, reaction steps required to synthesize the benzofuran substance in the prior art can be effectively shortened.
[EN] PREPARATION METHOD FOR 6-SUBSTITUTED AMINOBENZOFURAN COMPOUND<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN COMPOSÉ AMINOBENZOFURANE 6-SUBSTITUÉ<br/>[ZH] 一种6-取代氨基苯并呋喃化合物的制备方法
2',6'-Disubstituted N-benzoylated carbazole derivatives were found to exhibit atropisomerism. The bulky substituents restricted rotation about the N-C7' and C7'-C1' bonds to separate four atropisomers, in which rotation about the C7'-C1' bond was in perfect concert with rotation about the N-C7' bond. Complete geared rotation without slippage at 37 degrees C for 7 days was observed for the first time. Conformational analysis clarified the preference for the gear system over other internal conversion pathways.