β‐Enaminone Synthesis from 1,3‐Dicarbonyl Compounds and Aliphatic and Aromatic Amines Catalyzed by Iron Complexes of Fused Bicyclic Imidazo[1,5‐
<i>a</i>
]pyridine Derived N‐Heterocyclic Carbenes
作者:A. P. Prakasham、Manoj Kumar Gangwar、Prasenjit Ghosh
DOI:10.1002/ejic.201800906
日期:2019.1.17
fused bicyclic imidazo[1,5‐a]pyridine framework of the type [CpFe(2‐R‐imidazo[1,5‐a]pyridin‐3‐ylidene)(CO)2]BF4 R = mesityl (1c), nPr (2c)} successfully carried out the synthesis of β‐enamino ketones (3–10) and (17–27) and β‐enamino esters (11–16) and (28–36) by the condensation of acyclic and cyclic 1,3‐dicarbonyl compounds and various aliphatic and aromatic amines in the presence of light irradiation
一系列的Fe-NHC络合物(1 - 2)ç稠合的双环咪唑并[1,5-的一个]吡啶的类型的框架[CpFe的量(2-R -咪唑并[1,5-一个]吡啶-3-亚基)(CO)2 ] BF 4 R =异亚丙基丙酮(1C),ñ PR(图2c)}成功地进行了β烯氨基酮(合成3 - 10)和(17 - 27)和β-烯酯(11 – 16)和(28 – 36)在光照射下通过无环和环状1,3-二羰基化合物与各种脂肪族和芳香族胺的缩合而形成。相当显著,类型[CpFe的量(NHC)(acac)]的(的催化相关衬底加合物种类2E)和式[CpFe的量(NHC)(β的乘积加合物种类-烯胺酮)](2F所述的Fe的)已通过质谱研究检测到NHC前催化剂(2c)。[CpFe(2-R-咪唑并[1,5- a ]吡啶-3-亚基)(CO)2 ] BF 4 R =均三(1c),n Pr(2c)}络合物是从它们各自的N-杂环卡宾前体,即2-R-咪唑并[1