A synthesis of benzo[b]naphtho[2,3-d]thiophene derivatives via benzo[b]thiophene-2,3-quinodimethane intermediates was written by Kano, Shinzo;Mochizuki, Naoki;Yuasa, Yoko;Hibino, Satoshi;Shibuya, Shiroshi. And the article was included in Heterocycles in 1982.Synthetic Route of C9H7BrS This article mentions the following:
The thermal decomposition of 2-alkyl-3-(α-hydroxybenzyl)benzo[b]thiophenes I (R = H, Me; R1 = H, Ph; R2 = OMe, H) gave the resp. benzonaphthothiophenes II; fused compounds III (R = Me, Ph; R1 = H, OMe) were obtained by the thermal decomposition of benzothiophenes IV. I (R = R1 = H, R2 = OMe) was heated 5 min at 410° to give II (R = R1 = H, R2 = OMe). In the experiment, the researchers used many compounds, for example, 3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9Synthetic Route of C9H7BrS).
3-Bromo-2-methylbenzo[b]thiophene (cas: 10243-15-9) belongs to benzothiophene derivatives. Benzothiophene is used as starting material for the synthesis of bioactive molecules. The core structure is a part of various pharmaceutical substances and natural products. It is also used in the manufacturing of dyes such as thioindigo.Synthetic Route of C9H7BrS
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem