Copper-catalyzed cascade cyclization reaction of 3-aminocyclobutenones with electron-deficient internal alkynes: synthesis of fully substituted indoles

A novel copper-catalyzed cascade cyclization reaction of 3-aminocyclobutenones with electron-deficient internal alkynes has been developed. This reaction provides a new method for the synthesis of fully substituted indoles by formation of four new bonds and two rings in a single step.

Arbidol: a quarter-century after. Past, present and future of the original Russian antiviral

The present review is concerned with the synthesis and structure–activity relationship studies of Arbidol and its structural analogues. The latter are roughly divided into several unequal parts: indole- and benzofuran-based compounds, benzimidazole and imidazopyridine bioisosteres and ring-expanded quinoline derivatives. Much attention is focused on various types of antiviral activity of the above-mentioned Arbidol congeners, as well as of the parent compound itself. Features of Arbidol synthesis and metabolic changes are also discussed.

The bibliography includes 166 references.

Structural Analogs of Umifenovir. 1. Synthesis and Biological Activity of Ethyl 5-Hydroxy-1-Methyl-2-(Trans-2-Phenylcyclopropyl)-1H-Indole-3-Carboxylate

Ethyl 5-hydroxy-1-methyl-2-(trans-2-phenylcyclopropyl)-1H-indole-3-carboxylate is the first prototype of conformationally restricted analogs of umifenovir. It has been prepared using a one-pot method and has undergone an antiviral study.