Mechanisms of Diazo Coupling Reactions. Part XXXII. The Diazoamino Rearrangement in 20% Acetonitrile/Aqueous Buffers
作者:Richard P. Kelly、John R. Penton、Heinrich Zollinger
DOI:10.1002/hlca.19820650112
日期:1982.2.3
The rearrangements of 4′-methoxy-N-methyl- and N-methyl-4′-nitro-diatzoaminobenzene have been studied in 20% acetonitrile/aqueous buffers. The reactions are specifically acid catalyzed and involve pre-equilibrium formation of amine and diazonium salt followed by rate-limiting attack of the diazonium ion at a C-atom (C-coupling) to give the corresponding aminoazo compounds. There is no evidence to suggest
已在20%乙腈/水性缓冲液中研究了4'-甲氧基-N-甲基-和N-甲基-4'-硝基-二重氮氨基苯的重排。该反应经过特定的酸催化,涉及胺和重氮盐的预平衡形成,然后重氮离子在C原子上进行限速攻击(C偶联),得到相应的氨基偶氮化合物。没有证据表明,在当前条件下,除了已建立的弗里斯韦尔-格林机制之外,还存在其他机制。因此,可以通过一步法取代胺的传统两步合成法,即通过分离的重氮氨基化合物合成氨基偶氮化合物,该胺通过重氮离子在N原子上受到初始攻击(N耦合)。