Synthetic method and application of 2-hydroxyphenyl-5-pyrazinyl ketone

A method of synthesizing a 2-hydroxyphenyl-5-pyrazinel ketone represented by a following chemical formula (I) and unit cell parameters, 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 a 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:
• the unit cell parameters are as follows:
• collecting the diffraction data at a temperature of 273(2) K on an Oxford X-ray single crystal diffractometer using ω-θ scanning with CuKα rays 0.71073 Å, which is monochromatized by a graphite monochromator, wherein the crystal belongs to the orthorhombic system, the space group is P 21 21 21;
• the unit cell parameters are a=5.505 (2) Å α=90°;
• b=11.343(10) Å β=90°;
• c=14.796(13) Å γ=90°.