Synthetic Route of 6639-87-8, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.6639-87-8, Name is 6-Nitroquinoxaline, molecular formula is C8H5N3O2. In a article£¬once mentioned of 6639-87-8
REGIOSELECTIVITY IN THE REACTION OF NITROQUINOXALINE-N-OXIDES WITH PHOSPHORYL CHLORIDE
6-nitro-, 2-methyl-6-nitro- and 2,3-dimethyl-6-nitroquinoxaline have been transformed into their N-oxides by MCPBA in chloroform; the nitro group orients the oxygen atom preferentially to nitrogen atom N1, but the N4:N1 selectivity is diminished in the methylated derivatives.Under the action of POCl3 (the Meisenheimer reaction), the N-oxides of the unmethylated compounds are transformed into chloro-nitroquinoxalines having lost the N-oxide oxygen atom.The orientation of the entering chloride ion is discussed on the basis of electronic effects induced by the N-oxide and nitro groups, and it is suggested that the last step, the elimination of “HPO2Cl2” is a concerted process.
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 6639-87-8
Reference£º
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N963 | ChemSpider