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.
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