Graphical Abstract

Phenylselenoetherification was used to synthezise naphtho[2,3-b]furan-4,9-diones and naphtho[2,3-b]pyran-5,10-diones from 2-hydroxynaphthoquinones.

Graphical Abstract

The photolysis of naphtho[1,8-de]-1,3-dichalcogeninylidene 1-oxide derivatives at >290 nm generates ketenes.

Graphical Abstract

Naphthodioxin, 2-substituted naphthodioxins, 2,3-disubstituted naphthodioxins and several annulated dioxins were prepared in good yields.

Graphical Abstract

A short, convenient synthesis of two aromatic ring fused BEDT-TTF derivatives exploiting the cycloaddition reaction of o oligo(1,3-dithiole-2,4,5-trithione) is described.

Abstract; Graphical Abstract;

Graphical Abstract

The title pyranonaphthoquinone derivatives including three natural products were simply prepared.

Graphical Abstract

The novel furonaphthalimide 4 was prepared from 4-chloro-1,8-naphthalic anhydride, its photooxygenation gave the naphthalimide 6 by decomposition of the labile dioxetane 5. The fluorescence properties of the 1,8-napthalimide derivatives were determined.

Xylylene (1) and its benzo derivative generated flash pyrolytically polymerise or are trapped with HCl and PhSH but only the latter gives Diels-Alder adducts; xylylene (2) cyclises to give both naphtho 2,3-b and 1,2-b thiophenes.

Graphical Abstract

Several new acetyl-4H,9H-naphtho[1,2-b]thiophene-4,9-dione derivatives were synthesized and evaluated in vitro against seven cancer types. Compound 9 showed significant cytotoxicity against leukemia cells with log GI₅₀ values of −7.61 and −7.18 against SR and MOLT-4 cells.