First StableO-Amidinylhydroxylamines and Their Transformations into Sulfenamides by Intramolecular 1,5-O→S Amine Migration
作者:Franciszek Sączewski、Anita Kornicka、Maria Gdaniec、Rafal Hałasa、Władyslaw Werel
DOI:10.1002/ejoc.200400229
日期:2004.8
The reaction of 2-chloro-4,5-dihydroimidazole (1) with aliphatic hydroxylamines 2−4 gives O-amidinylhydroxylamines 5−7 in contrast to the analogous reaction of 1 with N-arylhydroxylamines in which N-substitution occurs. A number of thiocarbamoylsulfenamides 8−10 have been prepared by the reaction of 5−7 with carbon disulfide under basic and mild conditions. The key step in the 1,5-OS amine migration
2-氯-4,5-二氢咪唑 (1) 与脂肪族羟胺 2-4 的反应产生 O-脒基羟胺 5-7,这与 1 与发生 N-取代的 N-芳基羟胺的类似反应形成对比。许多硫代氨基甲酰基次磺酰胺 8-10 已通过 5-7 与二硫化碳在碱性和温和条件下的反应制备。1,5-OS 胺迁移的关键步骤涉及串联亲核加成-亲电胺化反应。该过程的分子间版本使用预先形成的二硫代氨基甲酸三乙基铵产生相应的次磺酰胺 14-16。通过用胺处理 8 和 9 获得官能化乙二胺 17-19。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)