使用简单的密封两室系统实现了异位生成一氧化碳 (CO) 及其在钯催化的羰基化反应中的有效结合的新技术。CO 的异位生成是通过钯催化的叔酰氯脱羰使用源自 Pd(dba)(2) 和 P(tBu)(3) 的催化剂产生的。使用新戊酰氯作为 CO 前体的初步研究为仅使用 1.5 当量的 CO 对 2-吡啶基甲苯磺酸酯衍生物进行氨基羰基化提供了另一种方法。 酰氯 CO 前体的进一步设计导致开发了一种新的固体、稳定、并且易于处理用于化学转化的 CO 源。这种 CO 前体的合成也为后期安装同位素碳标记的酰氯以随后释放气态 [(13)C]CO 提供了切入点。结合旨在应用 CO 作为限制剂的研究,该方法提供了高效的钯催化氨基羰基化,CO 结合率高达 96%。异位生成的 CO 和双室系统在几种药物化合物的合成中进行了测试,所有这些化合物都被标记为 [(13)C] 羰基对应物,基于限制 CO 的产率从良好到极好。
作者:Thomas M. Gøgsig、Dennis U. Nielsen、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/ol300837d
日期:2012.5.18
The direct carbonylativepalladiumcatalyzedsynthesis of monoprotected 1,3-ketoaldehydes is reported starting from aryl iodides applying near stoichiometric amounts of carbonmonoxide. Besides representing platforms for a variety of heterocyclic structures, these motives serve as viable precursors for the highly relevant aryl methyl ketones. The presented strategy can also be adapted for the facile
Access to β-Keto Esters by Palladium-Catalyzed Carbonylative Coupling of Aryl Halides with Monoester Potassium Malonates
作者:Signe Korsager、Dennis U. Nielsen、Rolf H. Taaning、Troels Skrydstrup
DOI:10.1002/anie.201304072
日期:2013.9.9
New tricks for an old dog: The Pd‐catalyzed carbonylative α‐arylation of monoethyl potassiummalonates with aryl bromides and reactive aryl chlorides provides a simple and direct route to aryl β‐ketoesters. Because only stoichiometric amounts of carbon monoxide are employed, the method is ideal for the introduction of carbon isotopes into more complex structures.
Direct Route to 1,3-Diketones by Palladium-Catalyzed Carbonylative Coupling of Aryl Halides with Acetylacetone
作者:Signe Korsager、Dennis U. Nielsen、Rolf H. Taaning、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1002/chem.201303872
日期:2013.12.23
Man up your magnesium! By employing a MgCl2/Et3N system, aryl diketones can be generated from the Pd‐catalyzed carbonylative α‐arylation of acetylacetone with aryl bromides (see scheme). The method is ideal for the introduction of carbon isotopes into more complex structures, since only stoichiometric amounts of carbon monoxide are employed.
举起你的镁!通过使用MgCl 2 / Et 3 N系统,可以从Pd催化的乙酰丙酮与芳基溴的羰基化α-芳基化反应生成芳基二酮(请参见方案)。该方法非常适合将碳同位素引入更复杂的结构中,因为仅使用化学计量的一氧化碳。
Access to Perfluoroalkyl-Substituted Enones and Indolin-2-ones via Multicomponent Pd-Catalyzed Carbonylative Reactions
作者:Hongfei Yin、Troels Skrydstrup
DOI:10.1021/acs.joc.7b00942
日期:2017.6.16
A simple method for accessing perfluoroalkyl-substituted enones is described applying a four-component palladium-catalyzed carbonylative coupling of aryl boronic acids together with terminal alkynes and perfluoroalkyl iodides in the presence of carbon monoxide. A wide range of highly functionalized enones can thus be prepared in a single operation in good yields. With 2-aminophenylalkynes, an intramolecular