The synthetic methodology for direct indole functionalizations is of great significance in
indole chemistry and has been intensively investigated in the last few decades. From the …

Graphene oxide (GO), as a metal-free and readily available carbocatalyst, has been
extensively applied in catalytic organic transformations. This minireview aims to give an …

Syntheses of highly functionalized 4-alkylated 1, 4-dihydropyridines (1, 4-DHPs) from cyclic
ethers and enaminones via iron (II)-mediated oxidative free radical cascade C (sp3)–H bond …

A novel, green and efficient method is developed for the synthesis of methylene bridged bis
(indolyl) methanes in good to excellent yields. The reaction employs methyl tert-butyl ether …

The direct C–H trifluoromethylation of alkynes and quinoxalinones has been achieved using
a graphene oxide/Langlois' reagent system. This multi-component tandem reaction using …

We report herein a Lewis acid-catalyzed nucleophilic double-addition of indoles to ketones
under mild conditions. This process occurs with various ketones ranging from dialkyl …

An efficient and general method for the synthesis of 3-sulfenylindoles and 3-selenylindoles
employing visible-light irradiation with graphene oxide as a promoter at room temperature …

A new and efficient method for the C3–chalcogenylation of indolines, employing visible light
irradiation, and graphene oxide as a promoter, at room temperature has been achieved. The …

Bisindolylmethanes (3, 3'-BIMs) compounds are important indole alkyloads and their units
are widely found in various natural products, functional materials and synthetic …

An Fe-mediated four-component reaction of enaminones, anhydrides and tetrahydrofuran
through a cascade [1+ 2+ 3]-cyclization/esterification process is presented. This protocol …