A series of 2-aryl-4,5-diphenylimidazoles were synthesized by one-step condensation reaction of （aromatic） aldehyde, diphenyl diketone and ammonium acetate（molar ratio 112） in acetic acid under microwave irradiati...A series of 2-aryl-4,5-diphenylimidazoles were synthesized by one-step condensation reaction of （aromatic） aldehyde, diphenyl diketone and ammonium acetate（molar ratio 112） in acetic acid under microwave irradiation. Products were characterized by mp, IR, (1H NMR), MS and elemental analysis, and their melting points are identical to those of the known compounds reported in the literature. The reaction time was 411 min and the yield 70%98%. Its a low energy （consumption）, environmentally benign, and easy process.展开更多
Volatile and semi-volatile components of Paeonia veitchii roots were extracted respectively from steam and water residue by using water steam distillation,their antibacterial activity were evaluated against 6 bacteria...Volatile and semi-volatile components of Paeonia veitchii roots were extracted respectively from steam and water residue by using water steam distillation,their antibacterial activity were evaluated against 6 bacteria(Escherichia coli,Staphylococcus aureus,Salmonella sp.,Bacillus megaterium,Bacillus brevis,Pseudomonas aeruginosa),and the chemical compositions were analyzed by GC-MS.The results indicated that the volatile components contained 2-hydroxy-benzaldehyde(20.24%),benzoic acid(21.64%),n-hexadecanoic acid(6.84%),oleic acid(8.76%),phenol(1.53%),methyl-salicylate(1.22%),furfural(2.49%),2,2-dimethy1-3-octene(2.22%),et al.,accounting for 97.18% of the volatile chemical components.The semi-volatile components contained 3,4,5-trihydroxy-benzoic acid(29.22%),1,2,3-benzenetriol(14.00%),benzoic acid(21.11%),4-hydroxy-3-methoxy-benzoic acid(3.18%),4-hydroxy-benzeneethanol(1.74%),2-hydroxy-benzaldehyde(1.94%),furfural(2.89%),1-(4-hydroxy-3-methoxy-pheny1)-ethanone(5.91%),5-hydroxymethyl-2-furancarboxaldehyde(3.09%),salicyl alcohol(2.04%),(Z,Z)-9,12-octadecadienoic acid(3.82%),accounting for 95.19% of the semi-volatile chemical components.The volatile and semi-volatile components of Radix Paeoniae Rubra exhibited good activity against Staphylococcus aureus and Salmonella sp.,and the semi-volatile components exhibited significant activity against Salmonella sp.in the terms of hypha growth rate.展开更多
文摘A series of 2-aryl-4,5-diphenylimidazoles were synthesized by one-step condensation reaction of （aromatic） aldehyde, diphenyl diketone and ammonium acetate（molar ratio 112） in acetic acid under microwave irradiation. Products were characterized by mp, IR, (1H NMR), MS and elemental analysis, and their melting points are identical to those of the known compounds reported in the literature. The reaction time was 411 min and the yield 70%98%. Its a low energy （consumption）, environmentally benign, and easy process.
文摘Volatile and semi-volatile components of Paeonia veitchii roots were extracted respectively from steam and water residue by using water steam distillation,their antibacterial activity were evaluated against 6 bacteria(Escherichia coli,Staphylococcus aureus,Salmonella sp.,Bacillus megaterium,Bacillus brevis,Pseudomonas aeruginosa),and the chemical compositions were analyzed by GC-MS.The results indicated that the volatile components contained 2-hydroxy-benzaldehyde(20.24%),benzoic acid(21.64%),n-hexadecanoic acid(6.84%),oleic acid(8.76%),phenol(1.53%),methyl-salicylate(1.22%),furfural(2.49%),2,2-dimethy1-3-octene(2.22%),et al.,accounting for 97.18% of the volatile chemical components.The semi-volatile components contained 3,4,5-trihydroxy-benzoic acid(29.22%),1,2,3-benzenetriol(14.00%),benzoic acid(21.11%),4-hydroxy-3-methoxy-benzoic acid(3.18%),4-hydroxy-benzeneethanol(1.74%),2-hydroxy-benzaldehyde(1.94%),furfural(2.89%),1-(4-hydroxy-3-methoxy-pheny1)-ethanone(5.91%),5-hydroxymethyl-2-furancarboxaldehyde(3.09%),salicyl alcohol(2.04%),(Z,Z)-9,12-octadecadienoic acid(3.82%),accounting for 95.19% of the semi-volatile chemical components.The volatile and semi-volatile components of Radix Paeoniae Rubra exhibited good activity against Staphylococcus aureus and Salmonella sp.,and the semi-volatile components exhibited significant activity against Salmonella sp.in the terms of hypha growth rate.
