N-Heterocyclic Carbene-Catalyzed Mannich Reaction for the Synthesis of β-Amino Ketones: <i>N</i>
,<i>N</i>
-Dimethylformamide as Carbon Source
作者:Anitha Alanthadka、E. Sankari Devi、A. Tamil Selvi、Subbiah Nagarajan、Vellaisamy Sridharan、C. Uma Maheswari
DOI:10.1002/adsc.201700125
日期:2017.7.17
strategy involves oxidative coupling of aryl methyl ketones and 2‐aminopyridines in the presence of DMF. The reaction does not require pre‐functionalization of the substrates, thus making it a practically applicable approach for the generation of β‐amino ketones. The reaction requires the use of tin(II) chloride dihydrate (SnCl2⋅2 H2O) as Lewis acid in the presence of tert‐butyl hydroperoxide (TBHP) as the
I<sub>2</sub>-Catalyzed Three-Component Consecutive Reaction for the Synthesis of 3-Aroylimidazo[1,2-<i>a</i>]-<i>N</i>-Heterocycles
作者:Yi Zhang、Rener Chen、Zhiming Wang、Lei Wang、Yongmin Ma
DOI:10.1021/acs.joc.1c00023
日期:2021.5.7
A convenient one-pot, three-component reaction has been developed for the synthesis of 3-aroylimidazo[1,2-a]-N-heterocycles from aryl ketones and 2-amino-N-heterocycles using dimethyl sulfoxide as a methylene donor. The reaction proceeds smoothly catalyzed by I2 in the presence of K2S2O8 and affords the desired products in moderate to good yields. This protocol offers significant superiority in accessing
已经开发了一种方便的一锅三组分反应,用于使用二甲基亚砜作为亚甲基供体,从芳基酮和2-氨基-N-杂环合成3-芳基咪唑并[1,2- a ] -N-杂环。在K 2 S 2 O 8的存在下,反应被I 2平稳催化,并以中等至良好的产率提供所需的产物。该协议在访问具有各种取代方式的生物活性3-芳基咪唑并[1,2- a ] -N-杂环时具有显着优势。