Trimethylsilyl Iodide as a Multifunctional Agent in the One-Pot Synthesis of 9-(1H-Indol-3-yl)xanthen-4-(9H)-ones from O-Methyl Protected Salicylaldehydes, Indoles, and β-Dicarbonyl Compounds
substitution/cyclization are performed to furnish the target product. The key step in this protocol is the deprotection of the methoxy group by TMSI. Trimethylsilyliodide (TMSI) is introduced as an efficient reagent for the one-pot synthesis of 9-(1H-indol-3-yl)xanthen-4-(9H)-ones using the reaction of 2-methoxybenzaldehydes (as O-methyl protected salicylaldehydes), indoles, and β-dicarbonyl compounds
l-Cysteine-functionalized magnetic nanoparticles (LCMNP): as a magnetic reusable organocatalyst for one-pot synthesis of 9-(1H-indol-3-yl) xanthen-4-(9H)-ones
l-Cysteine-functionalized magneticnanoparticles (LCMNP) were introduced as an efficient and magnetically separable organocatalyst for the synthesis of 9-(1H-indol-3-yl) xanthen-4-(9H)-one derivatives. This class of compounds was synthesized via a one-potthree-component coupling reaction of 2-hydroxybenzaldehyde, dimedone, and indole in the presence of catalytic amount of LCMNP under mild and green conditions.
<scp>
Fe
<sub>3</sub>
O
<sub>4</sub>
</scp>
@
<scp>
SiO
<sub>2</sub>
</scp>
@
<scp>D‐NHCS‐Tr</scp>
as an efficient and reusable catalyst for the synthesis of
<scp>
indol‐3‐yl‐4
<i>H</i>
</scp>
‐chromene via a multi‐component reaction under solvent‐free conditions
作者:Robabeh Baharfar、Sahar Peiman、Behrooz Maleki
DOI:10.1002/jhet.4258
日期:2021.6
Fe3O4@SiO2@D-NHCS-Tr was used as an efficientcatalyst in the three-component reaction between indole derivatives, salicylaldehyde, and active methylene compounds undersolvent-freeconditions to the synthesis of indol-3-yl-4H-chromene derivatives. The features of this method include the green conditions of the reaction, easy separation, eco-friendly and cost-effectiveness of the catalyst, and high yield in short
Fe 3 O 4 @SiO 2 @D-NHCS-Tr 被用作吲哚衍生物、水杨醛和活性亚甲基化合物在无溶剂条件下的三组分反应中合成吲哚-3-基-的有效催化剂。 4 H-色烯衍生物。该方法的特点是反应条件绿色、易分离、催化剂环保经济、反应时间短、收率高。