Phosgene-free synthesis of N-aryl-N'-4-pyridinylureas via selenium-catalyzed oxidative carbonylation of 4-aminopyridine with aromatic amines
作者:Xiaopeng Zhang、Zhengwei Li、Yan Wang、Shuxiang Dong、Xueli Niu、Guisheng Zhang
DOI:10.3998/ark.5550190.p009.683
日期:——
atom economy has been developed for the synthesis of N-aryl-N′-(4-pyridinyl)ureas. With cheap selenium as the catalyst, carbon monoxide (instead of phosgene) as the carbonyl reagent, N-aryl-N′-(4-pyridinyl)ureas can be obtained in a one-pot manner mostly in moderate to good yields via oxidative cross-carbonylation of 4-aminopyridine with a variety of aromatic amines in the presence of oxygen under atmospheric
已开发出一种简便、无光气且具有高原子经济性的方法来合成 N-芳基-N'-(4-吡啶基)脲。以廉价的硒为催化剂,以一氧化碳(而不是光气)为羰基试剂,可以通过氧化交叉以一锅法获得N-芳基-N'-(4-吡啶基)脲,大部分收率中等至良好- 4-氨基吡啶与多种芳香胺在氧气存在下在大气压下羰基化。还提出了合成N-芳基-N'-(4-吡啶基)脲的机理。