Simple synthesis of 7H-phenaleno[1,2-b]furan-7-one derivatives by one-pot, three-component reactions

Base-Catalyzed One-Pot Synthesis of 2,3,6-Substituted Pyridines

A three-component reaction catalyzed by base was established, which mainly consisted of ynals, isocyanates, amines and alcohols. This strategy provides a wide range of substrates and represents a simple process for the preparation of different pyridine derivatives in good yields with high regioselectivities.

A catalyst-free aqueous mediated multicomponent reaction of isocyanide: expeditious synthesis of polyfunctionalized cyclo[b]fused mono-, di- and tricarbazoles

A new multi-component reaction is developed for the synthesis of cyclo[b]fused mono-, di- and tricarbazoles from o-alkenyl arylisocyanides, aldehydes, and cyclic diketones in ethanol/water (1 : 1) as the solvent system.

Synthesis of Furocoumarins and Biscoumarins by an Isocyanide-Induced Multicomponent Reaction: Isocyanide as a Masked Amine

The three-component reaction involving chromone-3-carbaldehyde, 4-hydroxycoumarin and cyclohexyl isocyanide produces furocoumarin and biscoumarin derivatives. Formation of the latter compound seems to involve cyclohexylamine. Cyclohexyl isocyanide was found to act as a masked source of cyclohexylamine.

Isocyanide based [4+1] cycloaddition reactions: an indispensable tool in multi-component reactions (MCRs)

The advent of cycloaddition reactions in the synthesis of heterocycles and their ever burgeoning applications in the fields of materials chemistry, catalysis and drugs have been a profound scientific development.

Pseudo-five-component reaction between 3-formylchromones, meldrum's acid, isocyanides and primary arylamines: diversity-oriented synthesis of novel chromone-containing peptidomimetics

An efficient and practical method has been developed for the diversity-oriented synthesis of chromone-containing tripeptides via pseudo-five-component reaction between 3-formylchromones, Meldrum's acid, isocyanides and primary aromatic amines for the generation of a wide range of structurally interesting and pharmacologically significant compounds at ambient temperature. It is worth mentioning that in the course of this reaction, five new bonds (two C-C bonds, two C-N bonds and one C═O bond) are formed. In the present reaction three amide bonds are newly formed.

Three-Component Reaction between alkyl(aryl) Isocyanides and Dialkyl Acetylenedicarboxylates in the Presence of Ethyl Trifluoroacetate

The 1:1 intermediate generated by the addition of alkyl(aryl) isocyanides to dialkyl acetylenedicarboxylates is trapped by ethyl trifluoroacetate in the absence of a catalyst to form highly functionalized dialkyl 5-[alkyl(aryl)imino]-2-ethoxy-2-(trifluoromethyl)-2,5-dihydrofuran–-3,4-dicarboxylates in good yields.

One-Pot Three-Component Access to Pyranocyclopentendiones

An efficient synthesis of dialkyl 2-(alkylamino)-5,6-dioxo-4a,7-diphenyl-4,4a,5,6-tetrahydrocyclopenta[b]pyran-3,4-dicarboxylates from one-pot three-component reaction of the zwitterions generated from dialkyl acetylenedicarboxylates and alkyl isocyanides with 3,5-diphenylcyclopentane-1,2,4-trione is described.

An efficient synthesis of pyridazinoindazolones

An efficient synthesis of biologically interesting pyridazinoindazolone derivatives was achieved via a one-pot three-component p-toluenesulfonic acid-catalysed reaction of dimedone, differently substituted aldehydes, and 3,6-dihydroxypyridazine under solvent-free conditions. Two plausible mechanisms for the formation of pyridazinoindazolones are proposed.