Microwave‐assisted reactions: Three component process for the synthesis of 2‐amino‐2‐chromenes under microwave heating

Abstract

A simple and efficient three component process for the synthesis of 2‐amino‐2‐chromenes utilizing the reaction of aryl aldehydes 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h with active methylenes 2a,b and 1‐naphthol 3 in refluxing ethanol/piperidine under microwave‐heating is described. J. Heterocyclic Chem., (2009).

Cerium (IV) Ammonium Nitrate (CAN) Mediated Reactions IV. A Highly Efficient Synthesis of N,N’-Diarylsubstituted Formamidines in Water at Ambient Temperature

“…The resulting solid was collected by filtration and recrystallized from ethanol to afford analytically pure samples 3a-h. Compounds 3a-f have been described previously [31][32][33][34][35][36][37] and were found identical with our samples synthesized by our protocol.…”

Regioselectivity in the multicomponent reaction of 5-aminopyrazoles, cyclic 1,3-diketones and dimethylformamide dimethylacetal under controlled microwave heating

“…In continuation of our studies in which we performed multicomponent reactions using controlled microwave heating [ 22 – 24 ], we report herein the results of our investigation concerning the regioselectivity in multicomponent reactions of 5-aminopyrazoles, cyclic 1,3-diketones and dimethylformamide dimethylacetal (DMFDMA) under controlled microwave heating.…”