Unusual transformation of substituted-3-formylchromones to pyrimidine analogues: Synthesis and antimicrobial activities of 5-(o-hydroxyaroyl)pyrimidines
作者:Tilak Raj、Narinder Singh、M.P.S. Ishar
DOI:10.1016/j.bmcl.2013.09.024
日期:2013.11
Substituted-3-formylchromones (4a–e) on reaction with 1,3-bis-dimethylaminomethylene-thiourea (5) in refluxing toluene solution give novel substituted 5-(o-hydroxyaroyl)pyrimidines (6a–e) in high yields. A mechanistic rationalization of the formation of products (6a–e) is proffered. Antimicrobial activities of all the synthesized compounds (6a–e) were evaluated against various fungal and bacterial
SYNTHETIC METHOD AND APPLICATION OF 2-HYDROXYPHENYL-5-PYRAZINYL KETONE
申请人:Intelligent Manufacturing Institute of Hefei University of Technology
公开号:US20220033362A1
公开(公告)日:2022-02-03
Disclosed is a method of synthesizing a 2-hydroxyphenyl-5-pyrazinel ketone represented by the following chemical formula (I), comprising: weighing 0.048 g of a palladium complex, 0.8413 g of chromone-3-formaldehyde and 2.5719 g of ammonium formate into a 100 mL round bottom flask, then adding 50 mL of anhydrous methanol to dissolve, heating to reflux for 36 h, then stopping the reaction, performing column chromatography with petroleum ether and dichloromethane in a volume ratio of 1:1, and then naturally volatilizing the first component to obtain a light yellow crystal, namely the 2-hydroxyphenyl-5-pyrazinel ketone, referred to as compound (I); the chemical formula of the compound (I) is as follows:
an application of compound (I) as a catalyst in the reaction of benzophenone imine and trimethylsilyl nitrile showing a good catalytic performance, with a conversion rate of 69.1%.