Aryl-Aryl Bond Formation by Flash Vacuum Pyrolysis of Benzannulated Thiopyrans was written by Amick, Aaron W.;Wakamiya, Atsushi;Scott, Lawrence T.. And the article was included in Journal of Organic Chemistry in 2008.Name: Naphtho[2,1-b]benzofuran This article mentions the following:
In contrast to fully unsaturated 7-membered ring sulfur heterocycles (thiepines), some of which extrude sulfur and give the ring-contracted hydrocarbon even at room temperature in solution, benzannulated thiopyrans (6-membered sulfur heterocycles) require flash vacuum pyrolysis (FVP) conditions in the gas phase at temperatures in the range of 1000-1200 °C to promote the corresponding reaction. Thus, FVP of benzo[kl]thioxanthene (1 = I) gives fluoranthene, and naphtho[2,1,8,7-klmn]thioxanthene (6 = VI) gives benzo[ghi]fluoranthene (7 = VII). FVP of thioxanthone gives fluorenone together with lesser amounts of dibenzo[b,d]thiophene from competing decarbonylation. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Name: Naphtho[2,1-b]benzofuran).
Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Substituted benzofurans find applications such as fluorescent sensors, oxidants, in drug discovery, and in another field of chemistry and agriculture.Name: Naphtho[2,1-b]benzofuran
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem