Synthesis ofN-Phenyl-N′-pyrimidylurea Derivatives by Selenium- or Selenium Dioxide-Catalyzed Reductive Carbonylation of Nitroaromatics
作者:Jinzhu Chen、Gang Ling、Shiwei Lu
DOI:10.1002/ejoc.200300127
日期:2003.9
N-phenyl-N′-pyrimidylurea derivatives were synthesized in moderate-to-good yields by one-pot reductive carbonylation of nitroaromatics using selenium or selenium dioxide as the catalyst, aminopyrimidine derivatives as co-reagents, and carbon monoxide as the carbonyl source. The reaction parameters were investigated, as was the reusability of the catalysts. We found that selenium- or selenium dioxide-catalyzed
以硒或二氧化硒为催化剂,氨基嘧啶衍生物为助剂,一氧化碳为羰基,通过硝基芳烃的一锅还原羰基化合成了四十种不对称的N-苯基-N'-嘧啶基脲衍生物,收率中等至良好来源。研究了反应参数,以及催化剂的可重复使用性。我们发现硒或二氧化硒催化的硝基芳烃的还原羰基化表现出催化剂的反应控制相转移现象。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)