Metal-free oxidative coupling of arylmethylamines with indoles: a simple, environmentally benign approach for the synthesis of 3,3′-bis(indolyl)methanes

Abstract

The efficient metal-free oxidative coupling of arylmethylamines with indoles has been developed using molecular oxygen as a green oxidant towards a novel rout of 3,3′-bis(indolyl)methanes (BIMs) synthesis.

Recent Advances for Synthesis of Oxazole Heterocycles via C‐H/C‐N Bond Functionalization of Benzylamines

“…Although these synthetic strategies are present, there are some limitations among them. In the last few years, benzylamines have increased attention as substrates for designing a variety of nitrogen‐containing heterocycles [10–12] . In recent times, there are many reports for synthesis of oxazoles with great substrate scope using benzylamines and the starting materials having functionality such as 1,2‐dicarbonyls, 1,3‐dicarbonyls, α‐bromo ketones, aldehydes, ketones, alkynes, alkenes and chalcones.…”

“…In the last few years, benzylamines have increased attention as substrates for designing a variety of nitrogen-containing heterocycles. [10][11][12] In recent times, there are many reports for synthesis of oxazoles with great substrate scope using benzylamines and the starting materials having functionality such as 1,2-dicarbonyls, 1,3dicarbonyls, α-bromo ketones, aldehydes, ketones, alkynes, alkenes and chalcones. In this context, the present review article aims to assess the work reported on recent developments in the oxazole synthesis from benzylamines via CÀ H/ CÀ N bond functionalization.…”

Rapid One‐Pot Aerobic Oxidative N‐α‐C(sp3)‐H Functionalization of Arylmethylamines to Access Tetrasubstituted Imidazoles

“…Hence, the development of catalytic system under molecular oxygen or air as oxidant has been an increasing attention in the aerobic oxidation reactions development. [42][43][44][45][46][47][48][49][50] Traditionally, the Debus-Radziszewski imidazole synthesis meth-od is used to synthesize imidazoles by the carbonyl compounds and ammonium salts condensation. The different synthetic methods have been reported for preparation of trisubstituted imidazoles from isocyanides, nitriles, amino acids, imines, amides, and amidines substrates.…”

Simple practical method for synthesis of trisubstituted imidazoles: an efficient copper catalyzed multicomponent reaction

“…The importance of economic viability and nature balance means the development of environmentally benign, simple and fast protocols for synthesis of polysubstituted imidazoles still has signicant scope. To continue efforts towards synthesis of nitrogen containing heterocycles, [32][33][34][35][36] herein we are going to report an alternative simple and efficient method for the synthesis of polysubstituted imidazoles.…”