Category: quinoxaline. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Chloro(1,5-cyclooctadiene)copper(I) dimer, is researched, Molecular C16H16Cl2Cu2, CAS is 32717-95-6, about Organometallic chemistry. VI. Meerwein reaction. IV. Mechanistic aspects. Author is Al Adel, I.; Adeoti Salami, B.; Levisalles, J.; Rudler, H..
The key step in the Meerwein reaction of p-ClC6H4N2+ salts in the presence of unsaturated compounds is formation of aryl radicals; complexation of the Cu(I) salt with the unsaturated compound plays only a minor role. Thus, treatment of RCuCl or R2CuBF4 (R = cyclooctadiene) with p-ClC6H4N2+X- (X = Cl, BF4) gives no Meerwein products. Similarly, treatment of CH2:CHCH2OH, which complexes easily with Cu, with p-ClC6H4N2+ and a Cu(I) catalyst gives only 5% of the Meerwein product p-ClC6H4CH2CHClCH2OH. On the other hand, the Meerwein reaction of CH2:CH(CH2)2CH2OH with p-ClC6H4N2+ gives the Meerwein product p-ClC6H4CH2CHCl(CH2)2CH2OH, I [via an aryl intermediate oxidized to a carbocation by Cu(I)], as well as p-ClC6H4N:NCH(CH2C6H4Cl-p)(CH2)2CH2OH and II.
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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider