21124-73-2

Upstream product

• 123-11-5 4-methoxy-benzaldehyde 
• 104-94-9 4-methoxy-aniline 
• 1226-42-2 1,2-bis(4-methoxyphenyl)-1,2-ethanedione 
• 138240-22-9 N-(4-methoxyphenyl)-4-methoxybenzamidine 
• 120-44-5 1,4-di(4-methoxyphenyl)ethanone 
• 874-90-8 4-methoxybenzonitrile 

Relevant academic research and scientific papers

Structure-activity relationship study to understand the estrogen receptor-dependent gene activation of aryl- and alkyl-substituted 1H-imidazoles

A series of C5-substituted 1,2,4-triaryl-1H-imidazoles was synthesized. Their gene-activating properties were determined on estrogen receptor alpha positive MCF-7 breast cancer cells, stably transfected with the plasmid ERE wtcluc (MCF-7-2a cells). The influence of 4-OH and 2-Cl substituents on the phenyl rings as well as the significance of a methyl, ethyl, or phenyl group at C5 on the estrogen receptor binding and the resulting gene activation in MCF-7-2a cells was studied. The alkyl and aryl groups at C5 of 1,2,4-tris(4-hydroxyphenyl)-1H-imidazole 1 increased the transactivation, while chlorine atoms on the phenyl rings diminished this effect. 5-Ethyl-1,2,4-tris(4- hydroxyphenyl)-1H-imidazole 9 was identified as the most active compound. Its excellent transcriptional activity did not only depend on the C5 ethyl group, but also on the three hydroxyl groups of the phenyl rings. Compounds (11-14) with a reduced number of hydroxyl groups displayed distinctly lower gene activation.

Synthesis, structure, and photophysical properties of polyarylated imidazoles and oxazoles

23 tetraphenylimidazoles 1,2 and 11 triphenyl-oxazoles 4,5 with amino, nitro, methoxy, hydroxy, or halogeno substituants chiefly in the para position were prepared. The absorption and fluorescence emission properties were investigated in ethanolic solution. The effects of the substituents in 1,2 on the spectral shifts show that the arrangement of the phenyl rings in 1 position is not coplanar in relation to the heterocycle whereas the phenyl rings in 2 position are more coplanar. The spectral changes of compound 2a in solvents of various polarity (dielectric constants 2,02-47,24) are almost negligible. The Stokes shift is moderately increased. A remarkable increase in the fluorescence quantum yield is observed by chlorine substitution in phenyl ring 2.