An efficient solvent free Amberlite IRA-400 Cl resin mediated multicomponent synthesis and photophysical properties of fluorescent 4 H -chromene derivatives
An efficient Amberlite IRA-400 Cl basic anion exchange resin mediated multicomponent reaction of 2-hydroxybenzaldehydes, 1, 3-diketone and nucleophiles under neat condition afforded a number of fluorescent 4H-chromenederivatives in excellent yield. The structure of the synthesized compounds 4k and 4u were confirmed from single crystal XRD studies. 4H-Among the chromene derivatives, compound 4v synthesized
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.
bis(indolyl)methane and densely functionalized 4H-chromene, spirooxindole and spiro[indoline-3,4′-pyrano[2,3-c]pyrazole] derivative synthesis in good to excellent yields. The synergy between Brønstedacidity and surfactant ability of naturally available oleic acid was exploited to carry out the aforementioned transformations.
经鉴定,油酸可催化双(吲哚基)甲烷并以高至优异的产率催化功能化的4 H-色烯,螺并吲哚和螺[吲哚啉-3,4'-吡喃并[2,3- c ]吡唑]衍生物的合成。利用布朗斯台德酸度与天然油酸的表面活性剂能力之间的协同作用来进行上述转化。
<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。
Facile construction of 3-indolochromenes and 3-indoloxanthenes via EDDF catalyzed one-pot three component reactions
作者:Anuj Thakur、P. Linga Reddy、Mohit Tripathi、Diwan S. Rawat
DOI:10.1039/c5nj01288k
日期:——
EDDF–ethylene glycol, an ambiphilic catalytic system has been employed for the mild and rapid synthesis of various 3-indolochromenes and 3-indoloxanthenesviaa one-pot MCR. Besides recyclability of the catalyst, the present method circumvents the formation of any by-products.