In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 2213-63-0, name is 2,3-Dichloroquinoxaline, introducing its new discovery. COA of Formula: C8H4Cl2N2
A four tooth carboxylic acid based on quinoxaline ethyl ester synthetic method (by machine translation)
The invention discloses a four tooth carboxylic acid based on quinoxaline ethyl ester synthetic method, first of all will be 2, 3 – dichloro quinoxaline and 5 – amino isophthalic acid added reflux in ethanol, until a yellow solid after stopping the reaction; and then the step 1) of the yellow solid to filter, and ethanol washing, vacuum drying, to obtain the 2, 3 – b (5 – amino isophthalic acid) quinoxaline; subsequently weighing step 2) preparation of in 2, 3 – II (5 – amino isophthalic acid) quinoxaline several, and NH4 PF6 (Hexafluoro-phosphate), the reaction of the original carboxylic acid triethyl; finally filtered to obtain a yellow solid, the use of cold water, ethanol wash respectively 3 times, after vacuum drying recrystallized, is carried carboxylic acid ethyl ester is obtained. The reaction of the invention good selectivity, high yield, relatively mild reaction conditions and the operation is simple and easy to control, at the same time with the reaction raw material consumption, short reaction time, high yield, and simple in operation, effective and practical. (by machine translation)
We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 2213-63-0, and how the biochemistry of the body works.COA of Formula: C8H4Cl2N2
Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N1216 | ChemSpider