Mineral Oil/Methanol: A Cheap Biphasic Reaction Medium with Thermomorphic Properties and Its Application to the Palladium-Catalyzed Carbonylation of Nitrobenzene to Methyl Phenylcarbamate
作者:Francesco Ferretti、Emma Gallo、Fabio Ragaini
DOI:10.1002/cctc.201500452
日期:2015.7.13
We developed the methanol/mineral oil system as a new thermomorphic solvent mixture that allows homogeneous catalyst recovery without the use of water or fluorinated solvents. Mineral oil (nujol) is cheap and shows a very limited miscibility with methanol at room temperature but becomes completely miscible at high temperatures. Here we report the synthesis of some phenanthrolines substituted with long‐chain
我们开发了甲醇/矿物油系统,将其作为一种新型的热形溶剂混合物,无需使用水或氟化溶剂即可实现均相催化剂的回收。矿物油(nujol)价格便宜,在室温下与甲醇的混溶性非常有限,但在高温下会完全混溶。在这里,我们报道了一些被长链烷基取代的菲咯啉的合成,这些菲咯啉可溶于烃类,不溶于甲醇,并将其应用于钯催化的硝基苯羰基化为苯基苯基氨基甲酸酯。催化反应的试剂和产物在甲醇中的溶解度均比在烃中的溶解度高得多,因此可以轻松分离催化剂。