Citation:
ZHANG Ming, LU Jun-Rui, XIN Chun-Wei, LIU Fang, GAO Hui-Han, BAO Xiu-Rong, CHEN Li-Ran. Synthesis,Characterization and Antibacterial Activity of N,N'-Bis(2-hydroxybenzyl) Substituted Imidazolidine Derivatives[J]. Chinese Journal of Applied Chemistry,
;2009, 26(11): 1282-1286.
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A series of N,N'-bis(2-hydroxy benzyl) substituted imidazolidine derivatives(3a~3h) were designd and synthesized by means of combining segments o-hydroxy phenyl and imidazolidine compounds,according to the reinforcement of biological activities.The N,N'-bis-o-hydroxy benzyl diaminoethane(2) was synthesized using salicylaldehyde and 1,2-diaminoethane,through condensation reaction and then reduction by NaBH4,and further cyclization with aromatic aldehydes.The structures of all the compounds were confirmed by 1H NMR,IR,mass spectra and elemental analysis.The results show that the reaction of salicylaldehyde with 1,2-diaminoethane only formed the symmetric Schiff base(1),the condensation of aromatic aldehyde with compound 2 was noticeably different for different substituents: o-,p-substituted electron-withdrawing groups can activate aromatic aldehyde and result in a higher yield of ring closing reaction,but o-,p-substitute electron-donating groups have opposite effects.The result of preliminary bioassay shows that the target compounds had obvious specificity to different bacteria at 0.1%(mass concentration),and had an inhibitory rate of 100% on Monilia albican and Escherichia coli.
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