27693-39-6Relevant articles and documents
Metal-free oxidative: Para -acylation of unprotected anilines with N-heteroarylmethanes
Liu, Min,Chen, Xue,Chen, Tieqiao,Xu, Qing,Yin, Shuang-Feng
, p. 9845 - 9854 (2017)
A selective oxidative para-acylation of unprotected anilines with methyl groups in N-heteroarylmethanes was achieved. This transformation proceeds under mild metal-free reaction conditions to produce the corresponding valuable diarylmethanones in good to high yields, featuring high site-selectivity, high functional-group-tolerance, gram-scale synthesis and easy product-derivation. Preliminary mechanistic studies revealed that the present oxidative para-acylation would take place via a Friedel-Crafts-type process of in situ imines and the steric hindrance might be the key issue for the high regio-selectivity.