Nonmetal-Catalyzed Iodination of Arenes with Iodide and Hydrogen Peroxide
作者:Jernej Iskra、Stojan Stavber、Marko Zupan
DOI:10.1055/s-2004-829136
日期:——
lecular halogens for direct halogenation has drawbacks in the difficult and dangerous handling of chlorine and bro- mine, while iodine is less reactive. Nature has solved this problem by evolving haloperoxidases, enzymes that oxi- dize halide salts into reactive hypohalous derivatives. 3 Its counterpart in chemistry, named oxidative halogenation, has been utilized for iodination with a plethora of catalysts
在强酸存在下,用 1 当量 KI 和 2 当量 30% 过氧化氢的 MeOH 溶液对芳烃进行氧化碘化。各种取代的苯甲醚、苯酚和苯胺以及均三甲苯和尿嘧啶的反应具有选择性且有效,分离的卤代芳烃分子的收率非常高。卤代有机分子是药物和农业化学中的重要化合物,1 并且它们是化学合成中的重要合成中间体,特别是对于 CC 偶联反应。2 使用分子卤素进行直接卤化的缺点是氯和溴的处理困难且危险,而碘的反应性较低。大自然通过进化卤过氧化物酶解决了这个问题,将卤化物盐氧化成反应性次卤衍生物的酶。3 其在化学中的对应物称为氧化卤化,已被用于与大量催化剂和氧化剂以及分子碘或更少的碘化反应
Nicolet; Sampey, Journal of the American Chemical Society, 1927, vol. 49, p. 1798
作者:Nicolet、Sampey
DOI:——
日期:——
A Palladium-Catalyzed Double Carbonylation Approach to Isatins from 2-Iodoanilines
作者:Simon R. Laursen、Mikkel T. Jensen、Anders T. Lindhardt、Mikkel F. Jacobsen、Troels Skrydstrup
DOI:10.1002/ejoc.201600143
日期:2016.4
A high-yielding procedure for the synthesis of isatins has been developed. Sequential Pd-catalyzed double carbonylation of 2-iodoanilines with near stoichiometric amounts of CO followed by acid-promoted cyclization readily affords an array of isatins. The conversion of 2-iodoanilines to isatins in good to excellent yields was found to proceed with good functional group tolerance. This protocol proved