Polyoxometalate-Driven Ease Conversion of Valuable Furfural to <i>trans</i>-<i>N</i>,<i>N</i>-4,5-Diaminocyclopenten-2-ones
作者:Marina A. Tzani、Stella Fountoulaki、Ioannis N. Lykakis
DOI:10.1021/acs.joc.1c02550
日期:2022.3.4
efficacy of silicotungstic acid (H4SiW12O40) polyoxometalate (POM) toward the reaction between furfural and amines that selectively yields trans-N,N-4,5-substituted-diaminocyclopenten-2-ones (trans-DACPs). H4SiW12O40 facilitates the synthesis of a library of trans-DACPs with loadings as low as 0.05 mol %, in open air, without additives, in short times and good to high isolated yields. The protocol was applied
我们研究了硅钨酸 (H 4 SiW 12 O 40 ) 多金属氧酸盐 (POM) 对糠醛和胺之间反应的催化效果,该反应选择性地产生反式- N , N -4,5-取代二氨基环戊烯-2-酮 ( trans - DACP)。H 4 SiW 12 O 40促进反式-DACP 库的合成,其负载量低至0.05 mol%,在露天,无添加剂,在短时间内和良好的高分离产率。该方案适用于仲胺以及具有 p K b的芳族伯胺高于约 9. 目前的催化合成方案具有扩展的底物范围和高产率,据我们所知,它代表了第一个多金属氧酸盐驱动的范例,作为在温和反应条件下生产环戊酮框架的有效方法。
Silver-catalyzed nucleophilic substitution of aminals with ethyl diazoacetate: a new pathway to β-amino-α-diazoesters
作者:Jiawen Li、Guiping Qin、Hanmin Huang
DOI:10.1039/c6ob02136k
日期:——
A novel silver-catalyzed nucleophilicsubstitution of aminals with ethyl diazoacetate producing β-amino-α-diazoesters has been developed. A series of aminals with different amino moieties and substituents were successfully incorporated in this reaction, which delivered a wide range of β-amino-α-diazocarbonyl compounds in the presence of a lower catalyst loading in 2 hours.