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Novel asymmetric 3,5‐bis(arylidene)piperidin‐4‐one derivatives: synthesis, crystal structures and cytotoxicity
Author(s) -
Yao Binrong,
Li Ning,
Wang Chunhua,
Hou Guige,
Meng Qingguo,
Yan Ke
Publication year - 2018
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229618006605
Subject(s) - hydrogen bond , chemistry , stereochemistry , crystal structure , double bond , molecule , ketone , cytotoxicity , intermolecular force , crystallography , organic chemistry , biochemistry , in vitro
3,5‐Bis(arylidene)piperidin‐4‐one derivatives (BAPs) display good antitumour activity because of their double α,β‐unsaturated ketone structural characteristics. Reported BAPs have generally been symmetric and asymmetric BAPs have been little documented. Three asymmetric BAPs, namely (5 E )‐3‐(4‐ tert ‐butylbenzylidene)‐5‐(4‐fluorobenzylidene)‐1‐methylpiperidin‐4‐one, C 24 H 26 FNO, ( 5 ), (5 E )‐3‐(4‐ tert ‐butylbenzylidene)‐5‐(3,5‐dimethoxybenzylidene)‐1‐methylpiperidin‐4‐one, C 26 H 31 NO 3 , ( 6 ), and (5 E )‐3‐{3‐[( E )‐(2,3‐dihydroxybenzylidene)amino]benzylidene}‐5‐(2‐fluorobenzylidene)‐1‐methylpiperidin‐4‐one, C 27 H 23 FN 2 O 3 , ( 12 ), were generated by Claisen–Schmidt condensation. They are characterized by NMR and FT–IR spectroscopies, and elemental analysis. Single‐crystal structure analysis reveals that the two arylidene rings on both sides of the BAP structures adopt an E stereochemistry of the olefinic double bonds and the compounds are E , E isomers. Molecules of ( 5 ) and ( 12 ) generate one‐dimensional chains through intermolecular hydrogen bonds, while compound ( 6 ) generates a two‐dimensional network through hydrogen bonds. Preliminary cytotoxicities toward human liver hepatocellular carcinoma cell line (HepG2), human acute mononuclear granulocyte leukaemia (THP‐1) and human normal hepatical cell line (LO2) were evaluated.