A para-selective CH amidation of simplearenes with nitriles has been developed. By increasing the amount of arenes, a further meta-selective CH arylation of the produced amides occurred. Both steric and electronic effects are utilized to control the selectivity, resulting in only para-selectiveamidation products. The readily available nitriles as amidation reagents instead of amides makes the synthesis
Design, synthesis and computational studies of N-(substituted-phenyl)-4-(4-phenyl-1-piperazinyl)butanamides as potent anti-melanogenic and tyrosinase inhibitors
作者:Hussain Raza、Muhammad Athar Abbasi、Aziz-ur Rehman、Sabahat Zahra Siddiqui、Mubashir Hassan、Syed Adnan Ali Shah、Muhammad Shahid、Hansol Hong、Sung-Yum Seo
DOI:10.1016/j.molstruc.2020.127969
日期:2020.6
Abstract This manuscript describes the synthesis of some newN-(substituted-phenyl)-4-(4-phenyl-1-piperazinyl)butanamides (5a-c) through a facile bi-step strategy. The structures of these compounds were corroborated by their IR, EI-MS, 1H NMR, 13C NMR spectra along with CHN analysis data. The results of Mushroom tyrosinase in vitro inhibition revealed that all compounds were superb inhibitors of this enzyme