118172-64-8Relevant articles and documents
Tyrosol-biotin small molecular probe as well as preparation method and application thereof
-
Paragraph 0041-0053, (2021/04/14)
The invention discloses a tyrosol-biotin small molecular probe as well as a preparation method and application thereof. The structural formula of the tyrosol small molecular probe comprises tyrosol, biotin and a connecting chain. In-vitro activity tests s
Nitration method for aryl phenol or aryl ether derivative
-
Paragraph 0050-0055; 0083-0085, (2020/01/03)
The invention relates to a nitration method for an aryl phenol or aryl ether derivative. The method comprises the steps of stirring an aryl phenol or aryl ether compound, nitrate, trimethylchlorosilane (TMSCl) and a copper salt in an acetonitrile solution in air at room temperature, simultaneously, monitoring extent of reaction through a TLC dot plate, removing a solvent from a mixture by a rotaryevaporator after a substrate is consumed completely, and carrying out purification through a silica-gel column, thereby obtaining a nitroolefin derivative. Meanwhile, the selective mono-nitration orbis-nitration of the substrate can be achieved through controlling equivalent weight of the nitrate. Compared with the prior art, the nitration method disclosed by the invention has the advantages that the consumption of strong-acid substances is avoided, the reaction conditions are mild, the yield is high, the applicable range of the substrate is wide, reaction activity is free of obvious attenuation after an amplified reaction, and an excellent yield is still obtained, so that the method has an obvious industrial application value.
Steroid and nitro phenol esters from Bignonia unguis-cati roots
Dinda, Biswanath,De, Utpal Chandra,Achari, Basudev,Arima, Shiho,Sato, Nariko,Harigaya, Yoshihiro
, p. 1514 - 1518 (2007/10/03)
Two new esters, β-sitosterol cerotate 1 and 2-(4-hydroxy-3-nitrophenyl)ethyl stearate 2 have been isolated from the roots of Bignonia unguis-cati (Bignoniaceae) and their structures are elucidated by spectroscopic and chemical studies.