The author of 《Benzodithiophenes. A general method of synthesis》 were Gronowitz, Salo; Dahlgren, Torsten. And the article was published in Chemica Scripta in 1977. Recommanded Product: 2-(Thiophen-3-yl)-1,3-dioxolane The author mentioned the following in the article:
Through the Wittig reaction between o-bromoformylthiophenes and o-bromothenyltriphenylphosphoranes all six cis-1,2-di(o-bromothienyl)ethenes could be obtained. Halogen-metal exchange of these compounds with BuLi followed by reaction with CuCl2 yielded all six benzodithiophenes which are analogous to phenanthrene, namely benzo[1,2-b:4,3-b’]dithiophene, benzo[2,1-b:3,4-b’]dithiophene, benzo[1,2-b:3,4-b’]dithiophene, benzo[1,2-b:3,4-c’]dithiophene, benzo[2,1-b:3,4-c’]dithiophene and benzo[1,2-c:3,4-c’]dithiophene. The [b,c]-fused systems, although relatively stable in solution, could not be isolated due to dimerization or polymerization They could be characterized by reaction with di-Me acetylenedicarboxylate. After S extrusion, 7,8-dicarbomethoxynaphtho[2,1-b]thiophene and 7,8-dicarbomethoxynaphtho[1,2-b]thiophene are formed from the corresponding cycloaddition products. The other four benzodithiophenes did not react in the Diels-Alder reaction. The results came from multiple reactions, including the reaction of 2-(Thiophen-3-yl)-1,3-dioxolane(cas: 13250-82-3Recommanded Product: 2-(Thiophen-3-yl)-1,3-dioxolane)
2-(Thiophen-3-yl)-1,3-dioxolane(cas: 13250-82-3) is one of dioxolane. 1,3-Dioxolane derivatives are recognized as important motifs for the construction of numerous pharmacologically active molecules as antiviral, antifungal, anti-HIV, and adrenoreceptor antagonists.Recommanded Product: 2-(Thiophen-3-yl)-1,3-dioxolane
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem