- Medicine for preventing and treating gingivitis and preparation method thereof
-
The invention provides 3-nitro-8-substituted-2H-benzopyran compounds, a preparation method thereof and application thereof in preparing medicines for preventing and treating gingivitis and diseases caused by bacteroides fragilis ATCC 25285 or P.copporis ATCC 33547, and belongs to the field of medicinal chemistry. A series of compounds are prepared by a chemical synthesis method, and the structureis determined by mass spectrometry and nuclear magnetic resonance spectroscopy, and bacteriostatic activity experimental researches are performed on common pathogenic bacteria of gingivitis, bacteroides fragilis ATCC 25285 or P.copporis ATCC 33547. It is found that the novel compounds are comparable to or even better than positive control ciprofloxacin in activity, and are expected to be further developed into a therapeutic drug for gingivitis.
- -
-
Paragraph 0034-0035
(2021/05/26)
-
- Efficient conjugate addition of carbonyl compounds to 3-nitro-2H-chromenes in the presence of bases
-
The conjugate addition of aldehydes and ketones to 3-nitro-2H-chromenes under basic conditions has been explored. A series of inorganic and organic bases were examined. Proline combined with NaOAc was found to act as an efficient catalyst for the reaction
- Hu, Zhi-Peng,Zhang, Jun-Min,Lou, Chun-Liang,Wang, Jin-Jia,Nie, Shao-Zhen,Yan, Ming
-
experimental part
p. 17 - 33
(2011/03/17)
-
- New Direct Synthesis of 3-Nitro-2H-chromenes Using Nitroethylene
-
The treatment of substituted 2-hydroxybenzaldehydes by nitroethylene, prealably prepared or generated in situ within the reaction, in the presence of di-n-butylamine gave 3-nitro-2H-chromenes in fair to excellent yields.
- Neirabeyeh, Mamdouh Al,Koussini, Rafik
-
p. 783 - 788
(2007/10/02)
-